When raid takeovered, it used old personality to set task->comm.
Signed-off-by: majianpeng <majianpeng@xxxxxxxxx>
---
drivers/md/md.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1c2f904..93e20ea 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -32,6 +32,7 @@
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/blkdev.h>
#include <linux/sysctl.h>
@@ -3513,6 +3514,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
long level;
void *priv;
struct md_rdev *rdev;
+ char *tmp;
if (mddev->pers == NULL) {
if (len == 0)
@@ -3674,6 +3676,19 @@ level_store(struct mddev *mddev, const char *buf, size_t len)
del_timer_sync(&mddev->safemode_timer);
}
pers->run(mddev);
+ /*
+ * when raid takeover using old personality,so mddev->thread->tsk
+ * name is wrong.
+ * if kzalloc error, only using wrong name.
+ */
+ len = strlen(mdname(mddev)) + strlen(mddev->pers->name);
+ tmp = kzalloc(len + 2, GFP_KERNEL);
+ if (tmp) {
+ sprintf(tmp, "%s_%s", mdname(mddev), mddev->pers->name);
+ set_task_comm(mddev->thread->tsk, tmp);
+ kfree(tmp);
+ }
+
set_bit(MD_CHANGE_DEVS, &mddev->flags);
mddev_resume(mddev);
sysfs_notify(&mddev->kobj, NULL, "level");
--
1.7.5.4
--------------
majianpeng
2012-05-31
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