diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 77bbbc18ce1f..66c1084752f9 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -9656,13 +9656,26 @@ static void __perf_event_stop_swclock(void *__info) static void perf_event_exit_cpu_context(int cpu) { + struct perf_cpu_context *cpuctx; struct perf_event_context *ctx; + unsigned long flags; struct pmu *pmu; int idx; idx = srcu_read_lock(&pmus_srcu); list_for_each_entry_rcu(pmu, &pmus, entry) { - ctx = &per_cpu_ptr(pmu->pmu_cpu_context, cpu)->ctx; + cpuctx = per_cpu_ptr(pmu->pmu_cpu_context, cpu); + ctx = &cpuctx->ctx; + + /* Cancel the mux hrtimer to avoid CPU migration */ + if (pmu->task_ctx_nr != perf_sw_context) { + raw_spin_lock_irqsave(&cpuctx->hrtimer_lock, flags); + hrtimer_cancel(&cpuctx->hrtimer); + cpuctx->hrtimer_active = 0; + raw_spin_unlock_irqrestore(&cpuctx->hrtimer_lock, + flags); + } + mutex_lock(&ctx->mutex); /* * If keeping events across hotplugging is supported, do not |