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Add barrier support to dm-raid

PATCH In review Jonathan Brassow 2 participants 2 messages Feb 28, 2012

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MD RAID Device mapper
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Jonathan Brassow

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PATCH 1/1 Add barrier support to dm-raid

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 <[email protected]>
drivers/md/dm-raid.c +1 -0
Index: 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);