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| author | David S. Miller <davem@davemloft.net> | 2016-12-10 22:21:55 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-10 22:21:55 +0100 |
| commit | 821781a9f40673c2aa0f29d9d8226ec320dff20c (patch) | |
| tree | c9d5cb8a184fff84a9d841d8cb5da4b26be5c551 /kernel/events | |
| parent | net: skb_condense() can also deal with empty skbs (diff) | |
| parent | Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert... (diff) | |
| download | linux-821781a9f40673c2aa0f29d9d8226ec320dff20c.tar.xz linux-821781a9f40673c2aa0f29d9d8226ec320dff20c.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 22cc734aa1b2..faf073d0287f 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -903,17 +903,14 @@ list_update_cgroup_event(struct perf_event *event, */ cpuctx = __get_cpu_context(ctx); - /* Only set/clear cpuctx->cgrp if current task uses event->cgrp. */ - if (perf_cgroup_from_task(current, ctx) != event->cgrp) { - /* - * We are removing the last cpu event in this context. - * If that event is not active in this cpu, cpuctx->cgrp - * should've been cleared by perf_cgroup_switch. - */ - WARN_ON_ONCE(!add && cpuctx->cgrp); - return; - } - cpuctx->cgrp = add ? event->cgrp : NULL; + /* + * cpuctx->cgrp is NULL until a cgroup event is sched in or + * ctx->nr_cgroup == 0 . + */ + if (add && perf_cgroup_from_task(current, ctx) == event->cgrp) + cpuctx->cgrp = event->cgrp; + else if (!add) + cpuctx->cgrp = NULL; } #else /* !CONFIG_CGROUP_PERF */ |