diff options
| author | Bart Van Assche <[email protected]> | 2017-08-09 11:32:12 -0700 |
|---|---|---|
| committer | Mike Snitzer <[email protected]> | 2017-08-28 09:58:27 -0400 |
| commit | 1c23484c355ec360ca2f37914f8a4802c6baeead (patch) | |
| tree | 8825a50d4c93409de59318edf975023cbd3fc907 | |
| parent | 604407890ecf624c2fb41013c82b22aade59b455 (diff) | |
dm mpath: do not lock up a CPU with requeuing activity
When using the block layer in single queue mode, get_request()
returns ERR_PTR(-EAGAIN) if the queue is dying and the REQ_NOWAIT
flag has been passed to get_request(). Avoid that the kernel
reports soft lockup complaints in this case due to continuous
requeuing activity.
Fixes: 7083abbbf ("dm mpath: avoid that path removal can trigger an infinite loop")
Cc: [email protected]
Signed-off-by: Bart Van Assche <[email protected]>
Tested-by: Laurence Oberman <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
| -rw-r--r-- | drivers/md/dm-mpath.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 3486c829fa50..d24e4b05f5da 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -504,7 +504,6 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq, if (queue_dying) { atomic_inc(&m->pg_init_in_progress); activate_or_offline_path(pgpath); - return DM_MAPIO_REQUEUE; } return DM_MAPIO_DELAY_REQUEUE; } |