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authorBart Van Assche <bart.vanassche@sandisk.com>2017-04-27 10:11:26 -0700
committerMike Snitzer <snitzer@redhat.com>2017-04-27 17:08:47 -0400
commit86331f39a5935b092d3ea59446d416563ed05d16 (patch)
tree15eaf3fedb3bfd6252b7125e8d5c29daa71163b8 /drivers/md/dm.c
parent9a8ac3ae682e8760afebab71556a9a8d1b18f906 (diff)
dm mpath: make it easier to detect unintended I/O request flushes
I/O errors triggered by multipathd incorrectly not enabling the no-flush flag for DM_DEVICE_SUSPEND or DM_DEVICE_RESUME are hard to debug. Add more logging to make it easier to debug this. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 45660246e8f5..dbfaf6dde657 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2169,6 +2169,8 @@ static int __dm_suspend(struct mapped_device *md, struct dm_table *map,
*/
if (noflush)
set_bit(DMF_NOFLUSH_SUSPENDING, &md->flags);
+ else
+ pr_debug("%s: suspending with flush\n", dm_device_name(md));
/*
* This gets reverted if there's an error later and the targets