perf_counter: track task-comm data

Similar to the mmap data stream, add one that tracks the task COMM field,
so that the userspace reporting knows what to call a task.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130409.127422406@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/exec.c b/fs/exec.c
index e015c0b5a082..bf47ed0278ff 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -951,6 +951,7 @@ void set_task_comm(struct task_struct *tsk, char *buf)
         task_lock(tsk);
         strlcpy(tsk->comm, buf, sizeof(tsk->comm));
         task_unlock(tsk);
+        perf_counter_comm(tsk);
 }
 
 int flush_old_exec(struct linux_binprm * bprm)