[dm-devel] [PATCH] Add barrier support to dm-raid
Jonathan Brassow
jbrassow at redhat.com
Tue Feb 28 13:57:29 UTC 2012
Add barrier support to dm-raid.
MD has support for barriers. DM core has support for barriers. Set the
variable necessary to indicate to DM core that it is ok to pass down
barrier requests - which dm-raid will simply pass along to MD.
Signed-off-by: Jonathan Brassow <jbrassow at redhat.com>
Index: linux-upstream/drivers/md/dm-raid.c
===================================================================
--- linux-upstream.orig/drivers/md/dm-raid.c
+++ linux-upstream/drivers/md/dm-raid.c
@@ -971,6 +971,7 @@ static int raid_ctr(struct dm_target *ti
INIT_WORK(&rs->md.event_work, do_table_event);
ti->private = rs;
+ ti->num_flush_requests = 1;
mutex_lock(&rs->md.reconfig_mutex);
ret = md_run(&rs->md);
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