[tip:perfcounters/core] perf_counter: Add a comm hook for pure fork()s

tip-bot for Peter Zijlstra
2009-06-03T13:07:24Z

Commit-ID: 226f62fdd53d5b2c74e242aa11f6ad43d0285d3f
Gitweb: http://git.kernel.org/tip/226f62fdd53d5b2c74e242aa11f6ad43d0285d3f
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Wed, 3 Jun 2009 11:23:56 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 3 Jun 2009 14:14:30 +0200

perf_counter: Add a comm hook for pure fork()s

I noticed missing COMM events and found that we missed
reporting them for pure forks.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
kernel/fork.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 23bf757..b7d7a9f 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1412,6 +1412,12 @@ long do_fork(unsigned long clone_flags,
if (clone_flags & CLONE_VFORK) {
p->vfork_done = &vfork;
init_completion(&vfork);
+ } else {
+ /*
+ * vfork will do an exec which will call
+ * set_task_comm()
+ */
+ perf_counter_comm(p);
}

audit_finish_fork(p);