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authorAnton Blanchard <anton@samba.org>2009-07-16 15:44:29 +0200
committerIngo Molnar <mingo@elte.hu>2009-07-18 11:21:31 +0200
commited900c054b541254f0ce5cedaf75206e29bd614e (patch)
treec164aaefa1185744d4372d8ff5b11a86a8e1405a /kernel/fork.c
parent11b5f81e1b0ea0bc84fe32f0a27054e052b2bf84 (diff)
downloadblackbird-op-linux-ed900c054b541254f0ce5cedaf75206e29bd614e.tar.gz
blackbird-op-linux-ed900c054b541254f0ce5cedaf75206e29bd614e.zip
perf_counter: Log vfork as a fork event
Right now we don't output vfork events. Even though we should always see an exec after a vfork, we may get perfcounter samples between the vfork and exec. These samples can lead to some confusion when parsing perfcounter data. To keep things consistent we should always log a fork event. It will result in a little more log data, but is less confusing to trace parsing tools. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090716104817.589309391@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 467746b3f0aa..4812d60b29f8 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1408,14 +1408,11 @@ long do_fork(unsigned long clone_flags,
if (clone_flags & CLONE_VFORK) {
p->vfork_done = &vfork;
init_completion(&vfork);
- } else if (!(clone_flags & CLONE_VM)) {
- /*
- * vfork will do an exec which will call
- * set_task_comm()
- */
- perf_counter_fork(p);
}
+ if (!(clone_flags & CLONE_THREAD))
+ perf_counter_fork(p);
+
audit_finish_fork(p);
tracehook_report_clone(regs, clone_flags, nr, p);
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