| commit | 41719b03091911028116155deddc5eedf8c45e37 | [log] [tgz] |
|---|---|---|
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | Wed Jan 14 15:36:26 2009 +0100 |
| committer | Ingo Molnar <mingo@elte.hu> | Wed Jan 14 18:09:00 2009 +0100 |
| tree | 20a699807d78bc0af86b19443dc751415c0cc6f7 | |
| parent | 93d81d1aca26e64a75d06a85f7e128b5f49053e7 [diff] |
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>