Commit 1f271972 authored Aug 13, 2014 by Benjamin Marzinski Committed by Mike Snitzer Oct 05, 2014

dm mpath: stop queueing IO when no valid paths exist



'queue_io' is set so that IO is queued while paths are being
initialized.  Clear queue_io in __choose_pgpath if there are no valid
paths, since there are obviously no paths that can be initialized.
Otherwise IOs to the device will back up.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent 3d8aab2d

drivers/md/dm-mpath.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -317,8 +317,10 @@ static void __choose_pgpath(struct multipath *m, size_t nr_bytes)
		struct priority_group *pg;
		unsigned bypassed = 1;

		if (!m->nr_valid_paths)
		if (!m->nr_valid_paths) {
		m->queue_io = 0;
		goto failed;
		}

		/* Were we instructed to switch PG? */
		if (m->next_pg) {

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