diff options
| -rw-r--r-- | include/linux/perf_event.h | 5 | ||||
| -rw-r--r-- | kernel/events/core.c | 8 |
2 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 46fe5cfb5163..09915ae06d28 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -425,6 +425,11 @@ struct pmu { size_t task_ctx_size; /* + * Kmem cache of PMU specific data + */ + struct kmem_cache *task_ctx_cache; + + /* * PMU specific parts of task perf event context (i.e. ctx->task_ctx_data) * can be synchronized using this function. See Intel LBR callstack support * implementation and Perf core context switch handling callbacks for usage diff --git a/kernel/events/core.c b/kernel/events/core.c index 75090403f942..30d9b3182369 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1240,12 +1240,18 @@ static void get_ctx(struct perf_event_context *ctx) static void *alloc_task_ctx_data(struct pmu *pmu) { + if (pmu->task_ctx_cache) + return kmem_cache_zalloc(pmu->task_ctx_cache, GFP_KERNEL); + return kzalloc(pmu->task_ctx_size, GFP_KERNEL); } static void free_task_ctx_data(struct pmu *pmu, void *task_ctx_data) { - kfree(task_ctx_data); + if (pmu->task_ctx_cache && task_ctx_data) + kmem_cache_free(pmu->task_ctx_cache, task_ctx_data); + else + kfree(task_ctx_data); } static void free_ctx(struct rcu_head *head) |