Messages in this thread Patch in this message | | | Date | Wed, 17 Feb 2016 04:24:10 -0800 | From | tip-bot for Thomas Gleixner <> | Subject | [tip:perf/core] perf/core: Remove bogus UP_CANCELED hotplug state |
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Commit-ID: b4f75d44bed1bdbb14ac704bfc38f62a3675e591 Gitweb: http://git.kernel.org/tip/b4f75d44bed1bdbb14ac704bfc38f62a3675e591 Author: Thomas Gleixner <tglx@linutronix.de> AuthorDate: Tue, 9 Feb 2016 20:11:20 +0000 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 17 Feb 2016 10:37:28 +0100
perf/core: Remove bogus UP_CANCELED hotplug state
If CPU_UP_PREPARE fails the perf hotplug code calls perf_event_exit_cpu(), which is a pointless exercise. The cpu is not online, so the smp function calls return -ENXIO. So the result is a list walk to call noops.
Remove it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/20160209201007.682184765@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/events/core.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c index 5946460..474ffea 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9286,7 +9286,6 @@ perf_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu) perf_event_init_cpu(cpu); break; - case CPU_UP_CANCELED: case CPU_DOWN_PREPARE: perf_event_exit_cpu(cpu); break;
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