Commit-ID: 38b435b16c36b0d863efcf3f07b34a6fac9873fd Gitweb: http://git.kernel.org/tip/38b435b16c36b0d863efcf3f07b34a6fac9873fd Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> AuthorDate: Tue, 15 Mar 2011 14:37:10 +0100 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Wed, 16 Mar 2011 14:04:14 +0100 perf: Fix tear-down of inherited group events When destroying inherited events, we need to destroy groups too, otherwise the event iteration in perf_event_exit_task_context() will miss group siblings and we leak events with all the consequences. Reported-and-tested-by: Vince Weaver <vweaver1@xxxxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Cc: <stable@xxxxxxxxxx> # .35+ LKML-Reference: <1300196470.2203.61.camel@twins> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- kernel/perf_event.c | 13 ++++++++----- 1 files changed, 8 insertions(+), 5 deletions(-) diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 533f715..3472bb1 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -6722,17 +6722,20 @@ __perf_event_exit_task(struct perf_event *child_event, struct perf_event_context *child_ctx, struct task_struct *child) { - struct perf_event *parent_event; + if (child_event->parent) { + raw_spin_lock_irq(&child_ctx->lock); + perf_group_detach(child_event); + raw_spin_unlock_irq(&child_ctx->lock); + } perf_remove_from_context(child_event); - parent_event = child_event->parent; /* - * It can happen that parent exits first, and has events + * It can happen that the parent exits first, and has events * that are still around due to the child reference. These - * events need to be zapped - but otherwise linger. + * events need to be zapped. */ - if (parent_event) { + if (child_event->parent) { sync_child_event(child_event, child); free_event(child_event); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html