[PATCH] per-task-delay-accounting: delay accounting usage of taskstats interface
Usage of taskstats interface by delay accounting.
Signed-off-by: Shailabh Nagar <nagar@us.ibm.com>
Signed-off-by: Balbir Singh <balbir@in.ibm.com>
Cc: Jes Sorensen <jes@sgi.com>
Cc: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: Erich Focht <efocht@ess.nec.de>
Cc: Levent Serinol <lserinol@gmail.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 82ec913..ea9506d 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -18,13 +18,13 @@
#include <linux/kernel.h>
#include <linux/taskstats_kern.h>
+#include <linux/delayacct.h>
#include <net/genetlink.h>
#include <asm/atomic.h>
static DEFINE_PER_CPU(__u32, taskstats_seqnum) = { 0 };
static int family_registered;
kmem_cache_t *taskstats_cache;
-static DEFINE_MUTEX(taskstats_exit_mutex);
static struct genl_family family = {
.id = GENL_ID_GENERATE,
@@ -120,7 +120,10 @@
* goto err;
*/
-err:
+ rc = delayacct_add_tsk(stats, tsk);
+ stats->version = TASKSTATS_VERSION;
+
+ /* Define err: label here if needed */
put_task_struct(tsk);
return rc;
@@ -152,8 +155,14 @@
* break;
*/
+ rc = delayacct_add_tsk(stats, tsk);
+ if (rc)
+ break;
+
} while_each_thread(first, tsk);
read_unlock(&tasklist_lock);
+ stats->version = TASKSTATS_VERSION;
+
/*
* Accounting subsytems can also add calls here if they don't
@@ -233,8 +242,6 @@
if (!family_registered || !tidstats)
return;
- mutex_lock(&taskstats_exit_mutex);
-
is_thread_group = !thread_group_empty(tsk);
rc = 0;
@@ -292,7 +299,6 @@
err_skb:
nlmsg_free(rep_skb);
ret:
- mutex_unlock(&taskstats_exit_mutex);
return;
}