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authorPeter Zijlstra <peterz@infradead.org>2012-06-05 15:30:31 +0200
committerIngo Molnar <mingo@kernel.org>2012-06-06 16:59:44 +0200
commitb430f7c4706aeba4270c7ab7744fc504b9315e1c (patch)
treeca92a63aa1499981c30fccb63db1270596af2aad /arch/um/.gitignore
parent436d03faf6961b30e13b2d0967aea9d772d6cf44 (diff)
perf/x86: Fix Intel shared extra MSR allocation
Zheng Yan reported that event group validation can wreck event state when Intel extra_reg allocation changes event state. Validation shouldn't change any persistent state. Cloning events in validate_{event,group}() isn't really pretty either, so add a few special cases to avoid modifying the event state. The code is restructured to minimize the special case impact. Reported-by: Zheng Yan <zheng.z.yan@linux.intel.com> Acked-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1338903031.28282.175.camel@twins Signed-off-by: Ingo Molnar <mingo@kernel.org>
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