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authorLinus Torvalds <torvalds@linux-foundation.org>2011-06-08 08:36:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-08 08:36:15 -0700
commit33726bf2140a0e7c9de3ccd7cba6d69962f0b773 (patch)
treea4f5bca74d61072533806a2fe7f257357cae1ce2 /kernel
parent5b28f6a25ee202046e2d57bd431671bc23cf3dd1 (diff)
parentd7ebe75b065a7c2d58ffc12f9d2e00d5ea4e71eb (diff)
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Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Fix comments in include/linux/perf_event.h perf: Comment /proc/sys/kernel/perf_event_paranoid to be part of user ABI perf python: Fix argument name list of read_on_cpu() perf evlist: Don't die if sample_{id_all|type} is invalid perf python: Use exception to propagate errors perf evlist: Remove dependency on debug routines perf, cgroups: Fix up for new API
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/core.c22
-rw-r--r--kernel/sysctl.c6
2 files changed, 10 insertions, 18 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index d863b3c..9efe710 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -7402,26 +7402,12 @@ static int __perf_cgroup_move(void *info)
return 0;
}
-static void perf_cgroup_move(struct task_struct *task)
+static void
+perf_cgroup_attach_task(struct cgroup *cgrp, struct task_struct *task)
{
task_function_call(task, __perf_cgroup_move, task);
}
-static void perf_cgroup_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
- struct cgroup *old_cgrp, struct task_struct *task,
- bool threadgroup)
-{
- perf_cgroup_move(task);
- if (threadgroup) {
- struct task_struct *c;
- rcu_read_lock();
- list_for_each_entry_rcu(c, &task->thread_group, thread_group) {
- perf_cgroup_move(c);
- }
- rcu_read_unlock();
- }
-}
-
static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup *old_cgrp, struct task_struct *task)
{
@@ -7433,7 +7419,7 @@ static void perf_cgroup_exit(struct cgroup_subsys *ss, struct cgroup *cgrp,
if (!(task->flags & PF_EXITING))
return;
- perf_cgroup_move(task);
+ perf_cgroup_attach_task(cgrp, task);
}
struct cgroup_subsys perf_subsys = {
@@ -7442,6 +7428,6 @@ struct cgroup_subsys perf_subsys = {
.create = perf_cgroup_create,
.destroy = perf_cgroup_destroy,
.exit = perf_cgroup_exit,
- .attach = perf_cgroup_attach,
+ .attach_task = perf_cgroup_attach_task,
};
#endif /* CONFIG_CGROUP_PERF */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 4fc9244..f175d98 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -938,6 +938,12 @@ static struct ctl_table kern_table[] = {
},
#endif
#ifdef CONFIG_PERF_EVENTS
+ /*
+ * User-space scripts rely on the existence of this file
+ * as a feature check for perf_events being enabled.
+ *
+ * So it's an ABI, do not remove!
+ */
{
.procname = "perf_event_paranoid",
.data = &sysctl_perf_event_paranoid,
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