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authorLinus Torvalds <torvalds@linux-foundation.org>2017-10-14 15:16:49 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2017-10-14 15:16:49 -0400
commit26c923ab196601011b6dd51088f47ed840e7b666 (patch)
tree0781b1ae1e97ecf11cd81d0973bd815db20a1c4b /kernel
parent60a6ca6c943bee3c76b5905e66d5fcd83ae8d34f (diff)
parent47a74bdcbfeff543f706dc0e385eebbb5d655ed2 (diff)
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar: "Some tooling fixes plus three kernel fixes: a memory leak fix, a statistics fix and a crash fix" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/uncore: Fix memory leaks on allocation failures perf/core: Fix cgroup time when scheduling descendants perf/core: Avoid freeing static PMU contexts when PMU is unregistered tools include uapi bpf.h: Sync kernel ABI header with tooling header perf pmu: Unbreak perf record for arm/arm64 with events with explicit PMU perf script: Add missing separator for "-F ip,brstack" (and brstackoff) perf callchain: Compare dsos (as well) for CCKEY_FUNCTION
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/core.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 6bc21e202ae4..9d93db81fa36 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -662,7 +662,7 @@ static inline void update_cgrp_time_from_event(struct perf_event *event)
/*
* Do not update time when cgroup is not active
*/
- if (cgrp == event->cgrp)
+ if (cgroup_is_descendant(cgrp->css.cgroup, event->cgrp->css.cgroup))
__update_cgrp_time(event->cgrp);
}
@@ -8955,6 +8955,14 @@ static struct perf_cpu_context __percpu *find_pmu_context(int ctxn)
static void free_pmu_context(struct pmu *pmu)
{
+ /*
+ * Static contexts such as perf_sw_context have a global lifetime
+ * and may be shared between different PMUs. Avoid freeing them
+ * when a single PMU is going away.
+ */
+ if (pmu->task_ctx_nr > perf_invalid_context)
+ return;
+
mutex_lock(&pmus_lock);
free_percpu(pmu->pmu_cpu_context);
mutex_unlock(&pmus_lock);