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authorPeter Zijlstra <[email protected]>2016-03-10 15:39:24 +0100
committerIngo Molnar <[email protected]>2016-03-21 09:08:14 +0100
commit1e02cd40f15190b78fcc6b3f50c952fb4028e9a5 (patch)
tree7825f267ca1c1f9fb50d4c52612ae531661e406c /tools/perf/scripts/python/syscall-counts-by-pid.py
parent57d335ce88d055eb212e2531dd7a8b4240404a57 (diff)
perf/core: Fix the unthrottle logic
Its possible to IOC_PERIOD while the event is throttled, this would re-start the event and the next tick would then try to unthrottle it, and find the event wasn't actually stopped anymore. This would tickle a WARN in the x86-pmu code which isn't expecting to start a !stopped event. Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Alexander Shishkin <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: David Ahern <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vince Weaver <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
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