| Message ID | 1386242418-28045-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/drivers/md/md.c b/drivers/md/md.c index 866f489..a7e8d32 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3620,6 +3620,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len) mddev->in_sync = 1; del_timer_sync(&mddev->safemode_timer); } + blk_set_stacking_limits(&mddev->queue->limits); pers->run(mddev); set_bit(MD_CHANGE_DEVS, &mddev->flags); mddev_resume(mddev);
This is a note to let you know that I have just added a patch titled md: fix calculation of stacking limits on level change. to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From f2c0b522c20d6486205a1b674b8fdadc51ccbdc5 Mon Sep 17 00:00:00 2001 From: NeilBrown <neilb@suse.de> Date: Thu, 14 Nov 2013 15:16:15 +1100 Subject: md: fix calculation of stacking limits on level change. commit 02e5f5c0a0f726e66e3d8506ea1691e344277969 upstream. The various ->run routines of md personalities assume that the 'queue' has been initialised by the blk_set_stacking_limits() call in md_alloc(). However when the level is changed (by level_store()) the ->run routine for the new level is called for an array which has already had the stacking limits modified. This can result in incorrect final settings. So call blk_set_stacking_limits() before ->run in level_store(). A specific consequence of this bug is that it causes discard_granularity to be set incorrectly when reshaping a RAID4 to a RAID0. This is suitable for any -stable kernel since 3.3 in which blk_set_stacking_limits() was introduced. Reported-and-tested-by: "Baldysiak, Pawel" <pawel.baldysiak@intel.com> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/md/md.c | 1 + 1 file changed, 1 insertion(+) -- 1.8.3.2