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authorHannes Reinecke <hare@suse.de>2013-04-02 10:38:55 +0400
committerNeilBrown <neilb@suse.de>2013-06-14 02:10:26 +0400
commit90f5f7ad4f38d67626b0c220a0ac390603e0bded (patch)
tree740a41f4c451e0ee0f65f4fb3ca3120bce8b4189 /drivers/md/md.c
parent3f6bbd3ffd7b733dd705e494663e5761aa2cb9c1 (diff)
downloadlinux-90f5f7ad4f38d67626b0c220a0ac390603e0bded.tar.xz
md: Wait for md_check_recovery before attempting device removal.
When a device has failed, it needs to be removed from the personality module before it can be removed from the array as a whole. The first step is performed by md_check_recovery() which is called from the raid management thread. So when a HOT_REMOVE ioctl arrives, wait briefly for md_check_recovery to have run. This increases the chance that the ioctl will succeed. Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Neil Brown <nfbrown@suse.de>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9b82377a833b..3b25b72ef0b6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6405,6 +6405,12 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
/* need to ensure md_delayed_delete() has completed */
flush_workqueue(md_misc_wq);
+ if (cmd == HOT_REMOVE_DISK)
+ /* need to ensure recovery thread has run */
+ wait_event_interruptible_timeout(mddev->sb_wait,
+ !test_bit(MD_RECOVERY_NEEDED,
+ &mddev->flags),
+ msecs_to_jiffies(5000));
err = mddev_lock(mddev);
if (err) {
printk(KERN_INFO
@@ -7892,6 +7898,8 @@ void md_check_recovery(struct mddev *mddev)
md_new_event(mddev);
}
unlock:
+ wake_up(&mddev->sb_wait);
+
if (!mddev->sync_thread) {
clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
if (test_and_clear_bit(MD_RECOVERY_RECOVER,