[PATCH] md:Fix name of raid thread when raid takeovered
STALE5236d
From: majianpeng <hidden>
Date: 2012-05-31 07:41:22
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
When raid takeovered, it used old personality to set task->comm. Signed-off-by: majianpeng <redacted> --- 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