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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-08-13 11:47:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-13 12:58:05 +0200 |
| commit | 970892a9031a5dc7217bd394fb9d89fa75a4a7bc (patch) | |
| tree | d6d5eee6d24cde67c279d5cc753512fc85cd9e5b /kernel/dma-coherent.c | |
| parent | 3dab77fb1bf89664bb1c9544607159dcab6f7d57 (diff) | |
| download | op-kernel-dev-970892a9031a5dc7217bd394fb9d89fa75a4a7bc.zip op-kernel-dev-970892a9031a5dc7217bd394fb9d89fa75a4a7bc.tar.gz | |
perf_counter: Fix an ipi-deadlock
perf_pending_counter() is called from IRQ context and will call
perf_counter_disable(), however perf_counter_disable() uses
smp_call_function_single() which doesn't fancy being used with
IRQs disabled due to IPI deadlocks.
Fix this by making it use the local __perf_counter_disable()
call and teaching the counter_sched_out() code about pending
disables as well.
This should cover the case where a counter migrates before the
pending queue gets processed.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey J Ashford <cjashfor@us.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: stephane eranian <eranian@googlemail.com>
LKML-Reference: <20090813103655.244097721@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/dma-coherent.c')
0 files changed, 0 insertions, 0 deletions
