doc: clarify the behaviour of dirty_ratio/dirty_bytes
authorAndrea Righi <arighi@develer.com>
Wed, 27 Oct 2010 22:33:31 +0000 (15:33 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 28 Oct 2010 01:03:08 +0000 (18:03 -0700)
commitabffc0207f12563f17bbde96e4cc0d9f3d7e2a53
tree42a2b7ea028cf0bdc2b5f2d38386507768c8fe5c
parente45c9effed903ba3fdbd6ef0498ee8989c35af0a
doc: clarify the behaviour of dirty_ratio/dirty_bytes

When dirty_ratio or dirty_bytes is written the other parameter is disabled
and set to 0 (in dirty_bytes_handler() / dirty_ratio_handler()).

We do the same for dirty_background_ratio and dirty_background_bytes.

However, in the sysctl documentation, we say that the counterpart becomes
a function of the old value, that is not correct.

Clarify the documentation reporting the actual behaviour.

Reviewed-by: Greg Thelen <gthelen@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrea Righi <arighi@develer.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/sysctl/vm.txt