diff options
| author |   NeilBrown <neilb@suse.de> | 2014-05-06 09:36:08 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2014-05-06 09:49:31 +1000 |
| commit | 0f62fb220aa4ebabe8547d3a9ce4a16d3c045f21 (patch) | |
| tree | 7357293dea01b968a18a745640c8c15f93061ccc /drivers/md | |
| parent | md/raid10: call wait_barrier() for each request submitted. (diff) | |
| download | linux-dev-0f62fb220aa4ebabe8547d3a9ce4a16d3c045f21.tar.xz linux-dev-0f62fb220aa4ebabe8547d3a9ce4a16d3c045f21.zip | |
md: avoid possible spinning md thread at shutdown.
If an md array with externally managed metadata (e.g. DDF or IMSM)
is in use, then we should not set safemode==2 at shutdown because:
1/ this is ineffective: user-space need to be involved in any 'safemode' handling,
2/ The safemode management code doesn't cope with safemode==2 on external metadata
and md_check_recover enters an infinite loop.
Even at shutdown, an infinite-looping process can be problematic, so this
could cause shutdown to hang.
Cc: stable@vger.kernel.org (any kernel)
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 8fda38d23e38..237b7e0ddc7a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8516,7 +8516,8 @@ static int md_notify_reboot(struct notifier_block *this, if (mddev_trylock(mddev)) { if (mddev->pers) __md_stop_writes(mddev); - mddev->safemode = 2; + if (mddev->persistent) + mddev->safemode = 2; mddev_unlock(mddev); } need_delay = 1; |