9 years agocfq-iosched: adapt slice to number of processes doing I/O
Corrado Zoccolo [Mon, 26 Oct 2009 21:44:04 +0000]
cfq-iosched: adapt slice to number of processes doing I/O

When the number of processes performing I/O concurrently increases,
a fixed time slice per process will cause large latencies.

This patch, if low_latency mode is enabled,  will scale the time slice
assigned to each process according to a 300ms target latency.

In order to keep fairness among processes:
* The number of active processes is computed using a special form of
running average, that quickly follows sudden increases (to keep latency low),
and decrease slowly (to have fairness in spite of rapid decreases of this
value).

To safeguard sequential bandwidth, we impose a minimum time slice
(computed using 2*cfq_slice_idle as base, adjusted according to priority
and async-ness).

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: improve hw_tag detection
Shaohua Li [Tue, 27 Oct 2009 07:46:23 +0000]
cfq-iosched: improve hw_tag detection

If active queue hasn't enough requests and idle window opens, cfq will not
dispatch sufficient requests to hardware. In such situation, current code
will zero hw_tag. But this is because cfq doesn't dispatch enough requests
instead of hardware queue doesn't work. Don't zero hw_tag in such case.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq: break apart merged cfqqs if they stop cooperating
Jeff Moyer [Fri, 23 Oct 2009 21:14:52 +0000]
cfq: break apart merged cfqqs if they stop cooperating

cfq_queues are merged if they are issuing requests within the mean seek
distance of one another.  This patch detects when the coopearting stops and
breaks the queues back up.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq: change the meaning of the cfqq_coop flag
Jeff Moyer [Fri, 23 Oct 2009 21:14:51 +0000]
cfq: change the meaning of the cfqq_coop flag

The flag used to indicate that a cfqq was allowed to jump ahead in the
scheduling order due to submitting a request close to the queue that
just executed.  Since closely cooperating queues are now merged, the flag
holds little meaning.  Change it to indicate that multiple queues were
merged.  This will later be used to allow the breaking up of merged queues
when they are no longer cooperating.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq: merge cooperating cfq_queues
Jeff Moyer [Fri, 23 Oct 2009 21:14:50 +0000]
cfq: merge cooperating cfq_queues

When cooperating cfq_queues are detected currently, they are allowed to
skip ahead in the scheduling order.  It is much more efficient to
automatically share the cfq_queue data structure between cooperating processes.
Performance of the read-test2 benchmark (which is written to emulate the
dump(8) utility) went from 12MB/s to 90MB/s on my SATA disk.  NFS servers
with multiple nfsd threads also saw performance increases.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq: calculate the seek_mean per cfq_queue not per cfq_io_context
Jeff Moyer [Fri, 23 Oct 2009 21:14:49 +0000]
cfq: calculate the seek_mean per cfq_queue not per cfq_io_context

async cfq_queue's are already shared between processes within the same
priority, and forthcoming patches will change the mapping of cic to sync
cfq_queue from 1:1 to 1:N.  So, calculate the seekiness of a process
based on the cfq_queue instead of the cfq_io_context.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'for-linus' into for-2.6.33
Jens Axboe [Tue, 13 Oct 2009 10:29:45 +0000]
Merge branch 'for-linus' into for-2.6.33

9 years agocciss: Add cciss_allow_hpsa module parameter
Stephen M. Cameron [Tue, 13 Oct 2009 07:18:22 +0000]
cciss: Add cciss_allow_hpsa module parameter

Add cciss_allow_hpsa module parameter.  This parameter causes
the cciss driver to ignore any Smart Array devices known to be
supported by the hpsa driver.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocciss: Fix multiple calls to pci_release_regions
Stephen M. Cameron [Tue, 13 Oct 2009 07:18:22 +0000]
cciss: Fix multiple calls to pci_release_regions

Fix multiple calls to pci_release_regions.  If cciss_pci_init
fails, it already does any necessary call to pci_release_regions,
so this does not need to be done again in cciss_init_one in that
case.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblk-settings: fix function parameter kernel-doc notation
Randy Dunlap [Mon, 12 Oct 2009 06:20:47 +0000]
blk-settings: fix function parameter kernel-doc notation

Fix kernel-doc notation in blk-settings.c::blk_queue_max_discard_sectors().

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agowriteback: kill space in debugfs item name
Wu Fengguang [Fri, 9 Oct 2009 11:01:27 +0000]
writeback: kill space in debugfs item name

The space is not script friendly, kill it.

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agowriteback: account IO throttling wait as iowait
Wu Fengguang [Fri, 9 Oct 2009 10:40:42 +0000]
writeback: account IO throttling wait as iowait

It makes sense to do IOWAIT when someone is blocked
due to IO throttle, as suggested by Kame and Peter.

There is an old comment for not doing IOWAIT on throttle,
however it has been mismatching the code for a long time.

If we stop accounting IOWAIT for 2.6.32, it could be an
undesirable behavior change. So restore the io_schedule.

CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoelv_iosched_store(): fix strstrip() misuse
KOSAKI Motohiro [Fri, 9 Oct 2009 06:48:08 +0000]
elv_iosched_store(): fix strstrip() misuse

elv_iosched_store() ignore the return value of strstrip().  It makes small
inconsistent behavior.

This patch fixes it.

 <before>
 ====================================
 # cd /sys/block/{blockdev}/queue

 case1:
 # echo "anticipatory" > scheduler
 # cat scheduler
 noop [anticipatory] deadline cfq

 case2:
 # echo "anticipatory " > scheduler
 # cat scheduler
 noop [anticipatory] deadline cfq

 case3:
 # echo " anticipatory" > scheduler
 bash: echo: write error: Invalid argument

 <after>
 ====================================
 # cd /sys/block/{blockdev}/queue

 case1:
 # echo "anticipatory" > scheduler
 # cat scheduler
 noop [anticipatory] deadline cfq

 case2:
 # echo "anticipatory " > scheduler
 # cat scheduler
 noop [anticipatory] deadline cfq

 case3:
 # echo " anticipatory" > scheduler
 noop [anticipatory] deadline cfq

Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: avoid probable slice overrun when idling
Corrado Zoccolo [Thu, 8 Oct 2009 06:43:32 +0000]
cfq-iosched: avoid probable slice overrun when idling

If the average think time is larger than the remaining time slice
for any given queue, don't allow it to idle. A succesful idle also
means that we need to dispatch and complete a request, so if we don't
even have time left for the idle process, we would overrun the slice
in any case.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: apply bool value where we return 0/1
Jens Axboe [Wed, 7 Oct 2009 18:02:57 +0000]
cfq-iosched: apply bool value where we return 0/1

Saves 16 bytes of text, woohoo. But the more important point is
that it makes the code more readable when returning bool for 0/1
cases.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: fix think time allowed for seekers
Corrado Zoccolo [Wed, 7 Oct 2009 17:51:54 +0000]
cfq-iosched: fix think time allowed for seekers

CFQ enables idle only for processes that think less than the allowed
idle time. Since idle time is lower for seeky queues, we should use the
correct value in the comparison.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agodrbd: needs __ratelimit()
Randy Dunlap [Wed, 7 Oct 2009 17:26:00 +0000]
drbd: needs __ratelimit()

drbd_int.h uses __ratelimit(), so it needs to #include ratelimit.h:

drivers/block/drbd/drbd_int.h:1765: error: implicit declaration of function '__ratelimit'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: drbd-dev@lists.linbit.com
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: fix the slice residual sign
Jens Axboe [Tue, 6 Oct 2009 18:53:44 +0000]
cfq-iosched: fix the slice residual sign

We should subtract the slice residual from the rb tree key, since
a negative residual count indicates that the cfqq overran its slice
the last time. Hence we want to add the overrun time, to position
it a bit further away in the service tree.

Reported-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: abstract out the 'may this cfqq dispatch' logic
Jens Axboe [Tue, 6 Oct 2009 18:49:37 +0000]
cfq-iosched: abstract out the 'may this cfqq dispatch' logic

Makes the whole thing easier to read, cfq_dispatch_requests() was
a bit messy before.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblock: use proper BLK_RW_ASYNC in blk_queue_start_tag()
Jens Axboe [Tue, 6 Oct 2009 18:19:02 +0000]
block: use proper BLK_RW_ASYNC in blk_queue_start_tag()

Makes it easier to read than the 0.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblock: Seperate read and write statistics of in_flight requests v2
Nikanth Karthikesan [Tue, 6 Oct 2009 18:16:55 +0000]
block: Seperate read and write statistics of in_flight requests v2

Commit a9327cac440be4d8333bba975cbbf76045096275 added seperate read
and write statistics of in_flight requests. And exported the number
of read and write requests in progress seperately through sysfs.

But  Corrado Zoccolo <czoccolo@gmail.com> reported getting strange
output from "iostat -kx 2". Global values for service time and
utilization were garbage. For interval values, utilization was always
100%, and service time is higher than normal.

So this was reverted by commit 0f78ab9899e9d6acb09d5465def618704255963b

The problem was in part_round_stats_single(), I missed the following:
        if (now == part->stamp)
                return;

-       if (part->in_flight) {
+       if (part_in_flight(part)) {
                __part_stat_add(cpu, part, time_in_queue,
                                part_in_flight(part) * (now - part->stamp));
                __part_stat_add(cpu, part, io_ticks, (now - part->stamp));

With this chunk included, the reported regression gets fixed.

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>

--
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agodrbd: Work on permission enforcement
Philipp Reisner [Tue, 6 Oct 2009 07:30:14 +0000]
drbd: Work on permission enforcement

Now we have the capabilities of the sending process available,
use them to enforce CAP_SYS_ADMIN.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblock: get rid of kblock_schedule_delayed_work()
Jens Axboe [Mon, 5 Oct 2009 06:52:35 +0000]
block: get rid of kblock_schedule_delayed_work()

It was briefly introduced to allow CFQ to to delayed scheduling,
but we ended up removing that feature again. So lets kill the
function and export, and just switch CFQ back to the normal work
schedule since it is now passing in a '0' delay from all call
sites.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: fix possible problem with jiffies wraparound
Corrado Zoccolo [Mon, 5 Oct 2009 06:49:23 +0000]
cfq-iosched: fix possible problem with jiffies wraparound

The RR service tree is indexed by a key that is relative to current jiffies.
This can cause problems on jiffies wraparound.

The patch fixes it using time_before comparison, and changing
the add_front path to use a relative number, too.

Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: fix issue with rq-rq merging and fifo list ordering
Jens Axboe [Mon, 5 Oct 2009 09:03:39 +0000]
cfq-iosched: fix issue with rq-rq merging and fifo list ordering

cfq uses rq->start_time as the fifo indicator, but that field may
get modified prior to cfq doing it's fifo list adjustment when
a request gets merged with another request. This can cause the
fifo list to become unordered.

Reported-by: Corrado Zoccolo <czoccolo@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agodrbd: fixup for reverted dual in_flight patch
Jens Axboe [Mon, 5 Oct 2009 07:31:59 +0000]
drbd: fixup for reverted dual in_flight patch

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'master' into for-2.6.33
Jens Axboe [Mon, 5 Oct 2009 07:30:10 +0000]
Merge branch 'master' into for-2.6.33

9 years agoLinux 2.6.32-rc3
Linus Torvalds [Mon, 5 Oct 2009 00:12:30 +0000]
Linux 2.6.32-rc3

I'm skipping -rc2 because the -rc1 Makefile mistakenly said -rc2, so in
order to avoid confusion, I'm jumping from -rc1 to -rc3.  That way, when
'uname' (or an oops report) says 2.6.32-rc2, there's no confusion about
whether people perhaps meant -rc1 or -rc2.

9 years agoheaders: remove sched.h from poll.h
Alexey Dobriyan [Sun, 4 Oct 2009 12:11:37 +0000]
headers: remove sched.h from poll.h

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge branch 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
Linus Torvalds [Sun, 4 Oct 2009 22:03:00 +0000]
Merge branch 'acpi-pad' of git://git./linux/kernel/git/lenb/linux-acpi-2.6

* 'acpi-pad' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  acpi_pad: build only on X86
  ACPI: create Processor Aggregator Device driver

Fixup trivial conflicts in MAINTAINERS file.

9 years agoMerge branch 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb...
Linus Torvalds [Sun, 4 Oct 2009 22:00:08 +0000]
Merge branch 'sfi-release' of git://git./linux/kernel/git/lenb/linux-sfi-2.6

* 'sfi-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-sfi-2.6:
  SFI: remove __init from sfi_verify_table
  SFI: fix section mismatch warnings in sfi_core.c

9 years agoMerge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
Linus Torvalds [Sun, 4 Oct 2009 21:59:53 +0000]
Merge branch 'release' of git://git./linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI: EC: Don't parse DSDT for EC early init on Compal
  ACPI: EC: Rewrite DMI checks
  ACPI: dock: fix "sibiling" typo
  ACPI: kill overly verbose "throttling states" log messages
  ACPI: Fix bound checks for copy_from_user in the acpi /proc code
  ACPI: fix bus scanning memory leaks
  ACPI: EC: Restart command even if no interrupts from EC
  sony-laptop: Don't unregister the SPIC driver if it wasn't registered
  sony-laptop: remove _INI call at init time
  sony-laptop: SPIC unset IRQF_SHARED, set IRQF_DISABLED
  sony-laptop: remove device_ctrl and the SPIC mini drivers

9 years agoMerge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
Linus Torvalds [Sun, 4 Oct 2009 21:59:14 +0000]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  macintosh: Don't assume i2c device probing always succeeds
  i2c: Hide probe errors caused by ACPI resource conflicts
  i2c: Minor documentation update
  mfd: AB3100 drop unused module parameters
  Staging: IIO: tsl2561: Drop unused module parameters
  leds: leds-pca9532 - Drop unused module parameters
  ltc4215/ltc4245: Discard obsolete detect methods
  ds2482: Discard obsolete detect method
  max6875: Discard obsolete detect method
  i2c: Move misc devices documentation

9 years agomacintosh: Don't assume i2c device probing always succeeds
Jean Delvare [Sun, 4 Oct 2009 20:53:46 +0000]
macintosh: Don't assume i2c device probing always succeeds

If i2c device probing fails, then there is no driver to dereference
after calling i2c_new_device(). Stop assuming that probing will always
succeed, to avoid NULL pointer dereferences. We have an easier access
to the driver anyway.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Tim Shepard <shep@alum.mit.edu>
Cc: Colin Leroy <colin@colino.net>

9 years agoi2c: Hide probe errors caused by ACPI resource conflicts
Jean Delvare [Sun, 4 Oct 2009 20:53:45 +0000]
i2c: Hide probe errors caused by ACPI resource conflicts

When an ACPI resource conflict is detected, error messages are already
printed by ACPI. There's no point in causing the driver core to print
more error messages, so return one of the error codes for which no
message is printed.

This fixes bug #14293:
http://bugzilla.kernel.org/show_bug.cgi?id=14293

Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c: Minor documentation update
Jean Delvare [Sun, 4 Oct 2009 20:53:45 +0000]
i2c: Minor documentation update

The sysfs path to i2c adapters has changed recently, update the
documentation to reflect that change.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agomfd: AB3100 drop unused module parameters
Jean Delvare [Sun, 4 Oct 2009 20:53:44 +0000]
mfd: AB3100 drop unused module parameters

The I2C_CLIENT_INSMOD_1 macro is only useful for i2c drivers which
implement device detection. The ab3100 driver doesn't, so there is no
point in calling it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>

9 years agoStaging: IIO: tsl2561: Drop unused module parameters
Jean Delvare [Sun, 4 Oct 2009 20:53:43 +0000]
Staging: IIO: tsl2561: Drop unused module parameters

The I2C_CLIENT_INSMOD macro is only useful for i2c drivers which
implement device detection. The tsl2561 driver doesn't, so there
is no point in calling it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>

9 years agoleds: leds-pca9532 - Drop unused module parameters
Jean Delvare [Sun, 4 Oct 2009 20:53:43 +0000]
leds: leds-pca9532 - Drop unused module parameters

The I2C_CLIENT_INSMOD_1 macro is only useful for i2c drivers which
implement device detection. The leds-pca9532 driver doesn't, so there
is no point in calling it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Riku Voipio <riku.voipio@iki.fi>

9 years agoltc4215/ltc4245: Discard obsolete detect methods
Jean Delvare [Sun, 4 Oct 2009 20:53:42 +0000]
ltc4215/ltc4245: Discard obsolete detect methods

There is no point in implementing a detect callback for the LTC4215
and LTC4245, as these devices can't be detected. It was there solely
to handle "force" module parameters to instantiate devices, but now
we have a better sysfs interface that can do the same.

So we can get rid of the ugly module parameters and the detect
callbacks. This shrinks the binary module sizes by 36% and 46%,
respectively.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ira W. Snyder <iws@ovro.caltech.edu>

9 years agods2482: Discard obsolete detect method
Jean Delvare [Sun, 4 Oct 2009 20:53:41 +0000]
ds2482: Discard obsolete detect method

There is no point in implementing a detect callback for the DS2482, as
this device can't be detected. It was there solely to handle "force"
module parameters to instantiate devices, but now we have a better sysfs
interface that can do the same.

So we can get rid of the ugly module parameters and the detect callback.
This shrinks the binary module size by 21%.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Gardner <gardner.ben@gmail.com>

9 years agomax6875: Discard obsolete detect method
Jean Delvare [Sun, 4 Oct 2009 20:53:41 +0000]
max6875: Discard obsolete detect method

There is no point in implementing a detect callback for the MAX6875, as
this device can't be detected. It was there solely to handle "force"
module parameters to instantiate devices, but now we have a better sysfs
interface that can do the same.

So we can get rid of the ugly module parameters and the detect callback.
This basically divides the binary module size by 2.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Ben Gardner <gardner.ben@gmail.com>

9 years agoi2c: Move misc devices documentation
Jean Delvare [Sun, 4 Oct 2009 20:53:40 +0000]
i2c: Move misc devices documentation

Some times ago the eeprom and max6875 drivers moved to
drivers/misc/eeprom, but their documentation did not follow. It's
finally time to get rid of Documentation/i2c/chips.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ben Gardner <gardner.ben@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>

9 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Sun, 4 Oct 2009 19:39:14 +0000]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block: (41 commits)
  Revert "Seperate read and write statistics of in_flight requests"
  cfq-iosched: don't delay async queue if it hasn't dispatched at all
  block: Topology ioctls
  cfq-iosched: use assigned slice sync value, not default
  cfq-iosched: rename 'desktop' sysfs entry to 'low_latency'
  cfq-iosched: implement slower async initiate and queue ramp up
  cfq-iosched: delay async IO dispatch, if sync IO was just done
  cfq-iosched: add a knob for desktop interactiveness
  Add a tracepoint for block request remapping
  block: allow large discard requests
  block: use normal I/O path for discard requests
  swapfile: avoid NULL pointer dereference in swapon when s_bdev is NULL
  fs/bio.c: move EXPORT* macros to line after function
  Add missing blk_trace_remove_sysfs to be in pair with blk_trace_init_sysfs
  cciss: fix build when !PROC_FS
  block: Do not clamp max_hw_sectors for stacking devices
  block: Set max_sectors correctly for stacking devices
  cciss: cciss_host_attr_groups should be const
  cciss: Dynamically allocate the drive_info_struct for each logical drive.
  cciss: Add usage_count attribute to each logical drive in /sys
  ...

9 years agoRevert "Seperate read and write statistics of in_flight requests"
Jens Axboe [Sun, 4 Oct 2009 19:04:38 +0000]
Revert "Seperate read and write statistics of in_flight requests"

This reverts commit a9327cac440be4d8333bba975cbbf76045096275.

Corrado Zoccolo <czoccolo@gmail.com> reports:

"with 2.6.32-rc1 I started getting the following strange output from
"iostat -kx 2":
Linux 2.6.31bisect (et2)  04/10/2009  _i686_ (2 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          10,70    0,00    3,16   15,75    0,00   70,38

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda              18,22     0,00    0,67    0,01    14,77     0,02
43,94     0,01   10,53 39043915,03 2629219,87
sdb              60,89     9,68   50,79    3,04  1724,43    50,52
65,95     0,70   13,06 488437,47 2629219,87

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           2,72    0,00    0,74    0,00    0,00   96,53

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           6,68    0,00    0,99    0,00    0,00   92,33

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           4,40    0,00    0,73    1,47    0,00   93,40

Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s
avgrq-sz avgqu-sz   await  svctm  %util
sda               0,00     0,00    0,00    0,00     0,00     0,00
0,00     0,00    0,00   0,00 100,00
sdb               0,00     4,00    0,00    3,00     0,00    28,00
18,67     0,06   19,50 333,33 100,00

Global values for service time and utilization are garbage. For
interval values, utilization is always 100%, and service time is
higher than normal.

I bisected it down to:
[a9327cac440be4d8333bba975cbbf76045096275] Seperate read and write
statistics of in_flight requests
and verified that reverting just that commit indeed solves the issue
on 2.6.32-rc1."

So until this is debugged, revert the bad commit.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: don't delay async queue if it hasn't dispatched at all
Jens Axboe [Sun, 4 Oct 2009 18:36:19 +0000]
cfq-iosched: don't delay async queue if it hasn't dispatched at all

We cannot delay for the first dispatch of the async queue if it
hasn't dispatched at all, since that could present a local user
DoS attack vector using an app that just did slow timed sync reads
while filling memory.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev
Linus Torvalds [Sun, 4 Oct 2009 04:57:06 +0000]
Merge branch 'for-linus' of git://linux-m32r.org/git/takata/linux-2.6_dev

* 'for-linus' of git://www.linux-m32r.org/git/takata/linux-2.6_dev:
  m32r: Fix IPI function calls for SMP
  m32r: Fix set_memory() for DISCONTIGMEM
  m32r: add rtc_lock variable
  m32r: define ioread* and iowrite* macros
  m32r: export delay loop symbols
  m32r: fix tme_handler

9 years agotty: Avoid dropping ldisc_mutex over hangup tty re-initialization
Linus Torvalds [Sun, 4 Oct 2009 04:44:21 +0000]
tty: Avoid dropping ldisc_mutex over hangup tty re-initialization

A couple of people have hit the WARN_ON() in drivers/char/tty_io.c,
tty_open() that is unhappy about seeing the tty line discipline go away
during the tty hangup. See for example

http://bugzilla.kernel.org/show_bug.cgi?id=14255

and the reason is that we do the tty_ldisc_halt() outside the
ldisc_mutex in order to be able to flush the scheduled work without a
deadlock with vhangup_work.

However, it turns out that we can solve this particular case by

 - using "cancel_delayed_work_sync()" in tty_ldisc_halt(), which waits
   for just the particular work, rather than synchronizing with any
   random outstanding pending work.

   This won't deadlock, since the buf.work we synchronize with doesn't
   care about the ldisc_mutex, it just flushes the tty ldisc buffers.

 - realize that for this particular case, we don't need to wait for any
   hangup work, because we are inside the hangup codepaths ourselves.

so as a result we can just drop the flush_scheduled_work() entirely, and
then move the tty_ldisc_halt() call to inside the mutex.  That way we
never expose the partially torn down ldisc state to tty_open(), and hold
the ldisc_mutex over the whole sequence.

Reported-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Heinz Diehl <htd@fancy-poultry.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agom32r: Fix IPI function calls for SMP
Toshihiro HANAWA [Fri, 2 Oct 2009 08:52:54 +0000]
m32r: Fix IPI function calls for SMP

This patch fixes the m32r SMP kernel after 2.6.27.

A part of the following patch breaks m32r SMP operation.
> m32r: convert to generic helpers for IPI function calls
> commit 7b7426c8a615cf61df9a77b9df7d5b75d91e3fa0

In the above patch, a CALL_FUNC_SINGLE_IPI was newly introduced,
but the its IPI vector number was wrong in the patch code.

The m32r SMP kernel hanged-up during boot operation, because
the CPU_BOOT_IPI was called instead of CALL_FUNC_SINGLE_IPI
(CPU_BOOT_IPI had no side effect at that time because the 2nd
core had already been started up),
as a result, csd_unlock() was not called, then a dead lock
occurred in csd_lock_wait() after the detection of Compact Flash
memory as IDE generic disk.

Signed-off-by: Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agom32r: Fix set_memory() for DISCONTIGMEM
Hirokazu Takata [Wed, 23 Sep 2009 12:37:06 +0000]
m32r: Fix set_memory() for DISCONTIGMEM

In case CONFIG_DISCONTIGMEM is set, the memory size of system was
always determined by CONFIG_MEMORY_SIZE and was not changeable.

This patch fixes set_memory() of arch/m32r/mm/discontig.c so that
we can specify memory size by the "mem=<size>" kernel parameter.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agom32r: add rtc_lock variable
Hirokazu Takata [Wed, 26 Aug 2009 04:13:12 +0000]
m32r: add rtc_lock variable

Add a spinlock variable "rtc_lock".
This is taken from arch/arm/kernel/time.c.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agom32r: define ioread* and iowrite* macros
Hirokazu Takata [Wed, 26 Aug 2009 04:04:33 +0000]
m32r: define ioread* and iowrite* macros

Define ioread* and iowrite* macros to fix the following build errors:

CC [M] drivers/uio/uio_smx.o
drivers/uio/uio_smx.c: In function 'smx_handler':
drivers/uio/uio_smx.c:31: error: implicit declaration of function 'ioread32'
drivers/uio/uio_smx.c:37: error: implicit declaration of function 'iowrite32'

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agom32r: export delay loop symbols
Hirokazu Takata [Wed, 26 Aug 2009 04:09:12 +0000]
m32r: export delay loop symbols

- Move EXPORT_SYMBOL lines of delay loop functions
  from arch/m32r/kernel/m32r_ksyms.c to arch/m32r/lib/delay.c.
- Export __ndelay.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agom32r: fix tme_handler
Hirokazu Takata [Tue, 11 Aug 2009 14:12:41 +0000]
m32r: fix tme_handler

Fix pmd_bad check code of tme_handler (TLB Miss Exception handler).
The correct _KERNPG_TABLE value is not 0x263(=611) but 0x163.

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

9 years agoblock: Topology ioctls
Martin K. Petersen [Sat, 3 Oct 2009 18:52:01 +0000]
block: Topology ioctls

Not all users of the topology information want to use libblkid.  Provide
the topology information through bdev ioctls.

Also clarify sector size comments for existing BLK ioctls.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Sat, 3 Oct 2009 18:25:30 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of ssh://master.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (21 commits)
  ALSA: usb - Use strlcat() correctly
  ALSA: Fix invalid __exit in sound/mips/*.c
  ALSA: hda - Fix / improve ALC66x parser
  ALSA: ctxfi: Swapped SURROUND-SIDE mute
  sound: Make keywest_driver static
  ALSA: intel8x0 - Mute External Amplifier by default for Sony VAIO VGN-B1VP
  ALSA: hda - Fix digita/analog mic auto-switching with IDT codecs
  ASoC: fix kconfig order of Blackfin drivers
  ALSA: hda - Added quirk to enable sound on Toshiba NB200
  ASoC: Fix dependency of CONFIG_SND_PXA2XX_SOC_IMOTE2
  ALSA: Don't assume i2c device probing always succeeds
  ALSA: intel8x0 - Mute External Amplifier by default for Sony VAIO VGN-T350P
  ALSA: echoaudio - Re-enable the line-out control for the Mia card
  ALSA: hda - Resurrect input-source mixer of ALC268 model=acer
  ALSA: hda - Analog Devices AD1984A add HP Touchsmart model
  ALSA: hda - Add HP Pavilion dv4t-1300 to MSI whitelist
  ALSA: hda - CD-audio sound for hda-intel conexant benq laptop
  ASoC: DaVinci: Correct McASP FIFO initialization
  ASoC: Davinci: Fix race with cpu_dai->dma_data
  ASoC: DaVinci: Fix divide by zero error during 1st execution
  ...

9 years agoMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Linus Torvalds [Sat, 3 Oct 2009 18:24:19 +0000]
Merge branch 'for_linus' of git://git./linux/kernel/git/tytso/ext4

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  [PATCH] ext4: retry failed direct IO allocations
  ext4: Fix build warning in ext4_dirty_inode()
  ext4: drop ext4dev compat
  ext4: fix a BUG_ON crash by checking that page has buffers attached to it

9 years agocfq-iosched: use assigned slice sync value, not default
Jens Axboe [Sat, 3 Oct 2009 17:46:03 +0000]
cfq-iosched: use assigned slice sync value, not default

We should use the sysfs modified slice sync value, in case it differs
from the default.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: rename 'desktop' sysfs entry to 'low_latency'
Jens Axboe [Sat, 3 Oct 2009 17:42:18 +0000]
cfq-iosched: rename 'desktop' sysfs entry to 'low_latency'

Don't think that's necessarily a perfect description of what this
option fiddles with, but it's probably better than 'desktop'.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'fix/hda' into for-linus
Takashi Iwai [Sat, 3 Oct 2009 16:31:33 +0000]
Merge branch 'fix/hda' into for-linus

9 years agoMerge branch 'fix/asoc' into for-linus
Takashi Iwai [Sat, 3 Oct 2009 16:31:22 +0000]
Merge branch 'fix/asoc' into for-linus

9 years agocfq-iosched: implement slower async initiate and queue ramp up
Jens Axboe [Sat, 3 Oct 2009 14:26:03 +0000]
cfq-iosched: implement slower async initiate and queue ramp up

This slowly ramps up the async queue depth based on the time
passed since the sync IO, and doesn't allow async at all until
a sync slice period has passed.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocfq-iosched: delay async IO dispatch, if sync IO was just done
Vivek Goyal [Sat, 3 Oct 2009 13:21:27 +0000]
cfq-iosched: delay async IO dispatch, if sync IO was just done

o Do not allow more than max_dispatch requests from an async queue, if some
  sync request has finished recently. This is in the hope that sync activity
  is still going on in the system and we might receive a sync request soon.
  Most likely from a sync queue which finished a request and we did not enable
  idling on it.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblock: CFQ is more than a desktop scheduler
Jens Axboe [Sat, 3 Oct 2009 07:40:47 +0000]
block: CFQ is more than a desktop scheduler

Update Kconfig.iosched entry.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoblock: remove the anticipatory IO scheduler
Jens Axboe [Sat, 3 Oct 2009 07:37:51 +0000]
block: remove the anticipatory IO scheduler

AS is mostly a subset of CFQ, so there's little point in still
providing this separate IO scheduler. Hopefully at some point we
can get down to one single IO scheduler again, at least this brings
us closer by having only one intelligent IO scheduler.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agoMerge branch 'misc' into release
Len Brown [Sat, 3 Oct 2009 05:31:37 +0000]
Merge branch 'misc' into release

9 years agoMerge branch 'bugzilla-14081' into release
Len Brown [Sat, 3 Oct 2009 05:31:34 +0000]
Merge branch 'bugzilla-14081' into release

9 years agoACPI: EC: Don't parse DSDT for EC early init on Compal
Alexey Starikovskiy [Fri, 2 Oct 2009 16:21:40 +0000]
ACPI: EC: Don't parse DSDT for EC early init on Compal

Compal DSDT breaks if scanned early, while we need early scan
for almost all ASUS machines. Safest workaround seems to be to
continue do an early scan for all machines, but this Compal model.

http://bugzilla.kernel.org/show_bug.cgi?id=14086

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoACPI: EC: Rewrite DMI checks
Alexey Starikovskiy [Fri, 2 Oct 2009 16:21:33 +0000]
ACPI: EC: Rewrite DMI checks

Use dmi_check_system() for DMI matching.
Don't use string "Notebook" for matching MSI hardware.

http://bugzilla.kernel.org/show_bug.cgi?id=14081

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoSFI: remove __init from sfi_verify_table
Arjan van de Ven [Fri, 2 Oct 2009 14:29:47 +0000]
SFI: remove __init from sfi_verify_table

sfi_verify_table() is called at runtime, and thus cannot be __init

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoACPI: dock: fix "sibiling" typo
Alex Chiang [Thu, 1 Oct 2009 17:59:23 +0000]
ACPI: dock: fix "sibiling" typo

Crossword clues as haikus:

Snakes from the same brood
fighting Jackson on a plane?
sibilant siblings

I guess Will Shortz's job is still secure.

Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoACPI: kill overly verbose "throttling states" log messages
Roland Dreier [Wed, 30 Sep 2009 20:58:03 +0000]
ACPI: kill overly verbose "throttling states" log messages

I was recently lucky enough to get a 64-CPU system.  The processors
actually have T-states, so my kernel log ends up with 64 lines like:

    ACPI: Processor [CPU0] (supports xx throttling states)

This is pretty useless clutter because

 - this info is already available after boot from
   /proc/acpi/processor/CPUnn/throttling

 - there's also an ACPI_DEBUG_PRINT() in processor_throttling.c that
   gives the same info on boot for anyone who *really* cares.

So just delete the code that prints the throttling states in
processor_core.c.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoSFI: fix section mismatch warnings in sfi_core.c
Rakib Mullick [Wed, 30 Sep 2009 23:09:55 +0000]
SFI: fix section mismatch warnings in sfi_core.c

The function sfi_map_memory/sfi_unmap_memory uses
early_ioremap/early_iounmap respectively, which refers to a __init
function.  And function sfi_check_table also refers to a __init function
sfi_verify_table.  Since the references are valid, so use __ref to get rid
of the warnings.

 We were warned by the following warnings:

  LD      vmlinux.o
  MODPOST vmlinux.o
WARNING: vmlinux.o(.text+0xb6ba3a): Section mismatch in reference from
the function sfi_map_memory() to the function
.init.text:early_ioremap()
The function sfi_map_memory() references
the function __init early_ioremap().
This is often because sfi_map_memory lacks a __init
annotation or the annotation of early_ioremap is wrong.

WARNING: vmlinux.o(.text+0xb6bab6): Section mismatch in reference from
the function sfi_unmap_memory() to the function
.init.text:early_iounmap()
The function sfi_unmap_memory() references
the function __init early_iounmap().
This is often because sfi_unmap_memory lacks a __init
annotation or the annotation of early_iounmap is wrong.

WARNING: vmlinux.o(.text+0xb6be30): Section mismatch in reference from
the function sfi_check_table() to the function
.init.text:sfi_verify_table()
The function sfi_check_table() references
the function __init sfi_verify_table().
This is often because sfi_check_table lacks a __init
annotation or the annotation of sfi_verify_table is wrong.

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoACPI: Fix bound checks for copy_from_user in the acpi /proc code
Arjan van de Ven [Sat, 26 Sep 2009 18:50:25 +0000]
ACPI: Fix bound checks for copy_from_user in the acpi /proc code

The ACPI /proc write() code takes an unsigned length argument like any write()
function, but then assigned it to a *signed* integer called "len".
Only after this is a sanity check for len done to make it not larger than 4.

Due to the type change a len < 0 is in principle also possible; this patch
adds a check for this.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years ago[PATCH] ext4: retry failed direct IO allocations
Eric Sandeen [Sat, 3 Oct 2009 01:20:55 +0000]
[PATCH] ext4: retry failed direct IO allocations

On a 256M filesystem, doing this in a loop:

        xfs_io -F -f -d -c 'pwrite 0 64m' test
        rm -f test

eventually leads to ENOSPC.  (the xfs_io command does a
64m direct IO write to the file "test")

As with other block allocation callers, it looks like we need to
potentially retry the allocations on the initial ENOSPC.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

9 years agoext4: Fix build warning in ext4_dirty_inode()
Curt Wohlgemuth [Sat, 3 Oct 2009 01:08:32 +0000]
ext4: Fix build warning in ext4_dirty_inode()

This fixes the following warning:

fs/ext4/inode.c: In function 'ext4_dirty_inode':
fs/ext4/inode.c:5615: warning: unused variable 'current_handle'

We remove the jbd_debug() statement which does use current_handle, as
it's not terribly important in the grand scheme of things.

Thanks to Stephen Rothwell for pointing this out.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

9 years agoMerge master.kernel.org:/home/rmk/linux-2.6-arm
Linus Torvalds [Fri, 2 Oct 2009 23:20:43 +0000]
Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm: (25 commits)
  ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7
  ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()
  ARM: 5740/1: fix valid_phys_addr_range() range check
  ARM: 5739/1: ARM: allow empty ATAG_CORE
  ARM: 5735/1: sa1111: CodingStyle cleanups
  ARM: 5738/1: Correct TCM documentation
  ARM: 5734/1: arm: fix compilation of entry-common.S for older CPUs
  ARM: 5733/1: fix bcmring compile error
  ARM: 5732/1: remove redundant include file
  ARM: 5731/2: Fix U300 generic GPIO, remove ifdefs from MMCI v3
  ARM: Ensure do_cache_op takes mmap_sem
  ARM: Fix __cpuexit section mismatch warnings
  ARM: Don't allow highmem on SMP platforms without h/w TLB ops broadcast
  ARM: includecheck fix: mach-davinci, board-dm365-evm.c
  ARM: Remove unused CONFIG SA1100_H3XXX
  ARM: Fix warning: unused variable 'highmem'
  ARM: Fix warning: #warning syscall migrate_pages not implemented
  ARM: Fix SA11x0 clocksource warning
  ARM: Fix SA1100 Neponset serial section mismatch
  ARM: Fix SA1100 Assabet/Neponset PCMCIA section mismatch warnings
  ...

9 years agoARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7
Kirill A. Shutemov [Fri, 25 Sep 2009 12:40:49 +0000]
ARM: 5728/1: Proper prefetch abort handling on ARMv6 and ARMv7

Currently, on ARMv6 and ARMv7, if an application tries to execute
code (or garbage) on non-executable page it hangs. It caused by
incorrect prefetch abort handling. Now every prefetch abort
processes as a translation fault.

To fix this we have to analyze instruction fault status register
to figure out reason why we've got the abort and process it
accordingly.

To make IFSR different from DFSR we set bit 31 which is reserved in
both IFSR and DFSR.

This patch also tries to protect from future hangs on unexpected
exceptions. An application will be killed if unexpected exception
type was received.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 years agoARM: 5727/1: Pass IFSR register to do_PrefetchAbort()
Kirill A. Shutemov [Fri, 25 Sep 2009 12:39:47 +0000]
ARM: 5727/1: Pass IFSR register to do_PrefetchAbort()

Instruction fault status register, IFSR, was introduced on ARMv6 to
provide status information about the last insturction fault. It
needed for proper prefetch abort handling.

Now we have three prefetch abort model:

  * legacy - for CPUs before ARMv6. They doesn't provide neither
    IFSR nor IFAR. We simulate IFSR with section translation fault
    status for them to generalize code;
  * ARMv6 - provides IFSR, but not IFAR;
  * ARMv7 - provides both IFSR and IFAR.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 years agoARM: 5740/1: fix valid_phys_addr_range() range check
Greg Ungerer [Thu, 1 Oct 2009 23:45:28 +0000]
ARM: 5740/1: fix valid_phys_addr_range() range check

Commit 1522ac3ec95ff0230e7aa516f86b674fdf72866c
("Fix virtual to physical translation macro corner cases")
breaks the end of memory check in valid_phys_addr_range().
The modified expression results in the apparent /dev/mem size
being 2 bytes smaller than what it actually is.

This patch reworks the expression to correctly check the address,
while maintaining use of a valid address to __pa().

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 years agoARM: 5739/1: ARM: allow empty ATAG_CORE
David Brown [Thu, 1 Oct 2009 16:43:29 +0000]
ARM: 5739/1: ARM: allow empty ATAG_CORE

From: David Brown <davidb@quicinc.com>

The ATAG_CORE is allowed to be empty.  Although this is handled
by parse_tag_core(), __vet_atags during startup rejects this tag
unless it contains data.  Allow the initial tag to be either the
full size, or empty.

Signed-off-by: David Brown <davidb@quicinc.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 years agoARM: 5735/1: sa1111: CodingStyle cleanups
Hartley Sweeten [Tue, 29 Sep 2009 22:49:02 +0000]
ARM: 5735/1: sa1111: CodingStyle cleanups

EXPORT_* macros should follow immediately after the closing function
brace line.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

9 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/xscaleiop
Russell King [Fri, 2 Oct 2009 21:31:04 +0000]
Merge branch 'fixes' of git://git./linux/kernel/git/djbw/xscaleiop

Conflicts:
MAINTAINERS

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Fri, 2 Oct 2009 20:37:18 +0000]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (46 commits)
  cnic: Fix NETDEV_UP event processing.
  uvesafb/connector: Disallow unpliviged users to send netlink packets
  pohmelfs/connector: Disallow unpliviged users to configure pohmelfs
  dst/connector: Disallow unpliviged users to configure dst
  dm/connector: Only process connector packages from privileged processes
  connector: Removed the destruct_data callback since it is always kfree_skb()
  connector/dm: Fixed a compilation warning
  connector: Provide the sender's credentials to the callback
  connector: Keep the skb in cn_callback_data
  e1000e/igb/ixgbe: Don't report an error if devices don't support AER
  net: Fix wrong sizeof
  net: splice() from tcp to pipe should take into account O_NONBLOCK
  net: Use sk_mark for routing lookup in more places
  sky2: irqname based on pci address
  skge: use unique IRQ name
  IPv4 TCP fails to send window scale option when window scale is zero
  net/ipv4/tcp.c: fix min() type mismatch warning
  Kconfig: STRIP: Remove stale bits of STRIP help text
  NET: mkiss: Fix typo
  tg3: Remove prev_vlan_tag from struct tx_ring_info
  ...

9 years agocfq-iosched: add a knob for desktop interactiveness
Jens Axboe [Fri, 2 Oct 2009 17:27:04 +0000]
cfq-iosched: add a knob for desktop interactiveness

This is basically identical to what Vivek Goyal posted, but combined
into one and labelled 'desktop' instead of 'fairness'. The goal
is to continue to improve on the latency side of things as it relates
to interactiveness, keeping the questionable bits under this sysfs
tunable so it would be easy for throughput-only people to turn off.

Apart from adding the interactive sysfs knob, it also adds the
behavioural change of allowing slice idling even if the hardware
does tagged command queuing.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

9 years agocnic: Fix NETDEV_UP event processing.
Michael Chan [Fri, 2 Oct 2009 18:03:28 +0000]
cnic: Fix NETDEV_UP event processing.

This fixes the problem of not handling the NETDEV_UP event properly
during hot-plug or modprobe of bnx2 after cnic.  The handling was
skipped by mistakenly using "else if" to check for the event.

Also update version to 2.0.1.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Benjamin Li <benli@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agouvesafb/connector: Disallow unpliviged users to send netlink packets
Philipp Reisner [Fri, 2 Oct 2009 02:40:11 +0000]
uvesafb/connector: Disallow unpliviged users to send netlink packets

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agopohmelfs/connector: Disallow unpliviged users to configure pohmelfs
Philipp Reisner [Fri, 2 Oct 2009 02:40:10 +0000]
pohmelfs/connector: Disallow unpliviged users to configure pohmelfs

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agodst/connector: Disallow unpliviged users to configure dst
Philipp Reisner [Fri, 2 Oct 2009 02:40:09 +0000]
dst/connector: Disallow unpliviged users to configure dst

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agodm/connector: Only process connector packages from privileged processes
Philipp Reisner [Fri, 2 Oct 2009 02:40:08 +0000]
dm/connector: Only process connector packages from privileged processes

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoconnector: Removed the destruct_data callback since it is always kfree_skb()
Philipp Reisner [Fri, 2 Oct 2009 02:40:07 +0000]
connector: Removed the destruct_data callback since it is always kfree_skb()

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoconnector/dm: Fixed a compilation warning
Philipp Reisner [Fri, 2 Oct 2009 02:40:06 +0000]
connector/dm: Fixed a compilation warning

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoconnector: Provide the sender's credentials to the callback
Philipp Reisner [Fri, 2 Oct 2009 02:40:05 +0000]
connector: Provide the sender's credentials to the callback

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoconnector: Keep the skb in cn_callback_data
Philipp Reisner [Fri, 2 Oct 2009 02:40:04 +0000]
connector: Keep the skb in cn_callback_data

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Acked-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoe1000e/igb/ixgbe: Don't report an error if devices don't support AER
Frans Pop [Fri, 2 Oct 2009 17:04:12 +0000]
e1000e/igb/ixgbe: Don't report an error if devices don't support AER

The only error returned by pci_{en,dis}able_pcie_error_reporting() is
-EIO which simply means that Advanced Error Reporting is not supported.
There is no need to report that, so remove the error check from e1000e,
igb and ixgbe.

Signed-off-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agonet: Fix wrong sizeof
Jean Delvare [Fri, 2 Oct 2009 16:55:19 +0000]
net: Fix wrong sizeof

Which is why I have always preferred sizeof(struct foo) over
sizeof(var).

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agonet: splice() from tcp to pipe should take into account O_NONBLOCK
Eric Dumazet [Thu, 1 Oct 2009 22:26:00 +0000]
net: splice() from tcp to pipe should take into account O_NONBLOCK

tcp_splice_read() doesnt take into account socket's O_NONBLOCK flag

Before this patch :

splice(socket,0,pipe,0,128*1024,SPLICE_F_MOVE);
causes a random endless block (if pipe is full) and
splice(socket,0,pipe,0,128*1024,SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
will return 0 immediately if the TCP buffer is empty.

User application has no way to instruct splice() that socket should be in blocking mode
but pipe in nonblock more.

Many projects cannot use splice(tcp -> pipe) because of this flaw.

http://git.samba.org/?p=samba.git;a=history;f=source3/lib/recvfile.c;h=ea0159642137390a0f7e57a123684e6e63e47581;hb=HEAD
http://lkml.indiana.edu/hypermail/linux/kernel/0807.2/0687.html

Linus introduced  SPLICE_F_NONBLOCK in commit 29e350944fdc2dfca102500790d8ad6d6ff4f69d
(splice: add SPLICE_F_NONBLOCK flag )

  It doesn't make the splice itself necessarily nonblocking (because the
  actual file descriptors that are spliced from/to may block unless they
  have the O_NONBLOCK flag set), but it makes the splice pipe operations
  nonblocking.

Linus intention was clear : let SPLICE_F_NONBLOCK control the splice pipe mode only

This patch instruct tcp_splice_read() to use the underlying file O_NONBLOCK
flag, as other socket operations do.

Users will then call :

splice(socket,0,pipe,0,128*1024,SPLICE_F_MOVE | SPLICE_F_NONBLOCK );

to block on data coming from socket (if file is in blocking mode),
and not block on pipe output (to avoid deadlock)

First version of this patch was submitted by Octavian Purdila

Reported-by: Volker Lendecke <vl@samba.org>
Reported-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

9 years agoMerge branches 'sony-laptop', 'bugzilla-14247' and 'bugzilla-14271' into release
Len Brown [Fri, 2 Oct 2009 15:27:57 +0000]
Merge branches 'sony-laptop', 'bugzilla-14247' and 'bugzilla-14271' into release

9 years agoACPI: fix bus scanning memory leaks
Bjorn Helgaas [Fri, 2 Oct 2009 15:03:12 +0000]
ACPI: fix bus scanning memory leaks

Free an acpi_get_object_info() buffer when we're finished.  Skip the
acpi_get_name() altogether -- it was only used for a printk that was
really just for debug anyway.

http://bugzilla.kernel.org/show_bug.cgi?id=14271

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Reported-and-tested-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>

9 years agoACPI: EC: Restart command even if no interrupts from EC
Alexey Starikovskiy [Thu, 1 Oct 2009 22:53:15 +0000]
ACPI: EC: Restart command even if no interrupts from EC

EC may forget a command without sending any "reset" interrupt,
thus we need to lessen the requirement for transaction restart.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=14247
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>