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| author | Peter Zijlstra <peterz@infradead.org> | 2016-01-14 10:51:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-01-21 18:54:25 +0100 |
| commit | c97f473643a9d3e618c0f0426b926bc3a3e23944 (patch) | |
| tree | a3f1d2dd5876d3f05f03f92c99c993035049a043 /kernel | |
| parent | fae3fde65138b6071b1b0e0b567d4058a8b6a88c (diff) | |
| download | linux-c97f473643a9d3e618c0f0426b926bc3a3e23944.tar.gz linux-c97f473643a9d3e618c0f0426b926bc3a3e23944.tar.bz2 linux-c97f473643a9d3e618c0f0426b926bc3a3e23944.zip | |
perf: Add more assertions
Try to trigger warnings before races do damage.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 6620432491f6..3eaf91b104e9 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -263,6 +263,15 @@ static void event_function_call(struct perf_event *event, event_f func, void *da .data = data, }; + if (!event->parent) { + /* + * If this is a !child event, we must hold ctx::mutex to + * stabilize the the event->ctx relation. See + * perf_event_ctx_lock(). + */ + lockdep_assert_held(&ctx->mutex); + } + if (!task) { cpu_function_call(event->cpu, event_function, &efs); return; |