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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-01-14 15:36:26 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-14 18:09:00 +0100 |
| commit | 41719b03091911028116155deddc5eedf8c45e37 (patch) | |
| tree | 20a699807d78bc0af86b19443dc751415c0cc6f7 /kernel/mutex.h | |
| parent | 93d81d1aca26e64a75d06a85f7e128b5f49053e7 (diff) | |
| download | lwn-41719b03091911028116155deddc5eedf8c45e37.tar.gz lwn-41719b03091911028116155deddc5eedf8c45e37.zip | |
mutex: preemption fixes
The problem is that dropping the spinlock right before schedule is a voluntary
preemption point and can cause a schedule, right after which we schedule again.
Fix this inefficiency by keeping preemption disabled until we schedule, do this
by explicity disabling preemption and providing a schedule() variant that
assumes preemption is already disabled.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/mutex.h')
0 files changed, 0 insertions, 0 deletions