sched_clock: fix NOHZ interaction
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Mon, 1 Sep 2008 14:44:23 +0000 (16:44 +0200)
committerIngo Molnar <mingo@elte.hu>
Fri, 5 Sep 2008 16:14:08 +0000 (18:14 +0200)
commit56c7426b3951e4f35a71d695f1c982989399d6fd
tree26001a24308baceab1ff36eb8ab1ed43fb831a4f
parentb380b0d4f7dffcc235c0facefa537d4655619101
sched_clock: fix NOHZ interaction

If HLT stops the TSC, we'll fail to account idle time, thereby inflating the
actual process times. Fix this by re-calibrating the clock against GTOD when
leaving nohz mode.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/time/tick-sched.c