From: Joe Lawrence <Joe.Lawrence@stratus.com>
Date: Thu, 21 Feb 2013 02:28:09 +0000 (+1100)
Subject: md: raid1,10: Handle REQ_WRITE_SAME flag in write bios
X-Git-Tag: v3.9-rc2~28^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8dc9c654794a765ca61baed07f84ed8aaa7ca8c;p=pandora-kernel.git

md: raid1,10: Handle REQ_WRITE_SAME flag in write bios

Set mddev queue's max_write_same_sectors to its chunk_sector value (before
disk_stack_limits merges the underlying disk limits.)  With that in place,
be sure to handle writes coming down from the block layer that have the
REQ_WRITE_SAME flag set.  That flag needs to be copied into any newly cloned
write bio.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

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