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authorMing Lei <ming.lei@redhat.com>2018-01-11 14:01:55 +0800
committerMike Snitzer <snitzer@redhat.com>2018-01-17 09:16:18 -0500
commit459b54019cfeb7330ed4863ad40f78489e0ff23d (patch)
treeb700bef3cc4f480d11eca83888081a044c302b5a /drivers/md
parent050af08ffb1b62af69196d61c22a0755f9a3cdbd (diff)
downloadop-kernel-dev-459b54019cfeb7330ed4863ad40f78489e0ff23d.zip
op-kernel-dev-459b54019cfeb7330ed4863ad40f78489e0ff23d.tar.gz
dm mpath: return DM_MAPIO_DELAY_REQUEUE if QUEUE_IO or PG_INIT_REQUIRED
Avoid using DM_MAPIO_REQUEUE unless absolutely necessary because it results in dm-rq.c:dm_mq_queue_rq() returning BLK_STS_RESOURCE to blk-mq -- doing so should only ever be done if the underlying queue is out of resources. So switch to returning DM_MAPIO_DELAY_REQUEUE from multipath_clone_and_map() if either MPATHF_QUEUE_IO or MPATHF_PG_INIT_REQUIRED are set. Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-mpath.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index e018779..815de2b 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -517,9 +517,8 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq,
return DM_MAPIO_KILL;
} else if (test_bit(MPATHF_QUEUE_IO, &m->flags) ||
test_bit(MPATHF_PG_INIT_REQUIRED, &m->flags)) {
- if (pg_init_all_paths(m))
- return DM_MAPIO_DELAY_REQUEUE;
- return DM_MAPIO_REQUEUE;
+ pg_init_all_paths(m);
+ return DM_MAPIO_DELAY_REQUEUE;
}
mpio->pgpath = pgpath;
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