Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (5ffaf037) · Commits · 戴 / test

kernel/events/core.c

+19 −4

Original line number	Diff line number	Diff line
		@@ -1031,7 +1031,7 @@ perf_cgroup_set_timestamp(struct task_struct *task,
		{
		}

		void
		static inline void
		perf_cgroup_switch(struct task_struct task, struct task_struct next)
		{
		}
		@@ -10535,6 +10535,15 @@ perf_event_alloc(struct perf_event_attr *attr, int cpu,
		goto err_ns;
		}

		/*
		* Disallow uncore-cgroup events, they don't make sense as the cgroup will
		* be different on other CPUs in the uncore mask.
		*/
		if (pmu->task_ctx_nr == perf_invalid_context && cgroup_fd != -1) {
		err = -EINVAL;
		goto err_pmu;
		}

		if (event->attr.aux_output &&
		!(pmu->capabilities & PERF_PMU_CAP_AUX_OUTPUT)) {
		err = -EOPNOTSUPP;
		@@ -11323,8 +11332,11 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
		int err;

		/*
		* Get the target context (task or percpu):
		* Grouping is not supported for kernel events, neither is 'AUX',
		* make sure the caller's intentions are adjusted.
		*/
		if (attr->aux_output)
		return ERR_PTR(-EINVAL);

		event = perf_event_alloc(attr, cpu, task, NULL, NULL,
		overflow_handler, context, -1);
		@@ -11336,6 +11348,9 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
		/* Mark owner so we could distinguish it from user events. */
		event->owner = TASK_TOMBSTONE;

		/*
		* Get the target context (task or percpu):
		*/
		ctx = find_get_context(event->pmu, task, event);
		if (IS_ERR(ctx)) {
		err = PTR_ERR(ctx);
		@@ -11787,7 +11802,7 @@ inherit_event(struct perf_event *parent_event,
		GFP_KERNEL);
		if (!child_ctx->task_ctx_data) {
		free_event(child_event);
		return NULL;
		return ERR_PTR(-ENOMEM);
		}
		}

		@@ -11890,7 +11905,7 @@ static int inherit_group(struct perf_event *parent_event,
		if (IS_ERR(child_ctr))
		return PTR_ERR(child_ctr);

		if (sub->aux_event == parent_event &&
		if (sub->aux_event == parent_event && child_ctr &&
		!perf_get_aux_event(child_ctr, leader))
		return -EINVAL;
		}

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