| commit | 6d558c3ac9b6508d26fd5cadccce51fc9d726b1c | |
| author | Yong Zhang <yong.zhang0@gmail.com> | |
| Mon, 11 Jan 2010 06:21:25 +0000 (11 14:21 +0800) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Thu, 21 Jan 2010 12:39:04 +0000 (21 13:39 +0100) | ||
| tree | dbad2aa9c5874ea7ee5fff1f9f32b0be208c3df6 | treesnapshot (tar.gz zip) |
| parent | 50b926e439620c469565e8be0f28be78f5fca1ce | commitdiff |
sched: Reassign prev and switch_count when reacquire_kernel_lock() fail
Assume A->B schedule is processing, if B have acquired BKL before and it
need reschedule this time. Then on B's context, it will go to
need_resched_nonpreemptible for reschedule. But at this time, prev and
switch_count are related to A. It's wrong and will lead to incorrect
scheduler statistics.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <2674af741001102238w7b0ddcadref00d345e2181d11@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Assume A->B schedule is processing, if B have acquired BKL before and it
need reschedule this time. Then on B's context, it will go to
need_resched_nonpreemptible for reschedule. But at this time, prev and
switch_count are related to A. It's wrong and will lead to incorrect
scheduler statistics.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <2674af741001102238w7b0ddcadref00d345e2181d11@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| kernel/sched.c | diffblobblamehistory |