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| author | Anton Blanchard <anton@samba.org> | 2011-03-09 14:38:42 +1100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-03-16 14:04:13 +0100 |
| commit | 0837e3242c73566fc1c0196b4ec61779c25ffc93 (patch) | |
| tree | db77cdc93b99b1433b73a461f44543983af746bc /kernel | |
| parent | 7d5d02dadd43db7f829775e404e82019c5d5586f (diff) | |
| download | op-kernel-dev-0837e3242c73566fc1c0196b4ec61779c25ffc93.zip op-kernel-dev-0837e3242c73566fc1c0196b4ec61779c25ffc93.tar.gz | |
perf, powerpc: Handle events that raise an exception without overflowing
Events on POWER7 can roll back if a speculative event doesn't
eventually complete. Unfortunately in some rare cases they will
raise a performance monitor exception. We need to catch this to
ensure we reset the PMC. In all cases the PMC will be 256 or less
cycles from overflow.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: <stable@kernel.org> # as far back as it applies cleanly
LKML-Reference: <20110309143842.6c22845e@kryten>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions
