diff options
| author | Anton Blanchard <anton@samba.org> | 2011-03-09 14:38:42 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-21 12:45:51 -0700 |
| commit | 9008aa5b68fe409f419c4404de3fb36d43abbe39 (patch) | |
| tree | 702641142e523545b4448f6f415c5810a5af20e4 /fs | |
| parent | 585f09f8bfb60e2b093da4fc7d6078dd8e161bb4 (diff) | |
perf, powerpc: Handle events that raise an exception without overflowing
commit 0837e3242c73566fc1c0196b4ec61779c25ffc93 upstream.
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>
LKML-Reference: <20110309143842.6c22845e@kryten>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions