[Devel] [PATCH RHEL7 COMMIT] ploop: disable WRITE SAME for io_kaio

[Konstantin Khorenko]

The commit is pushed to "branch-rh7-3.10.0-229.7.2.vz7.9.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-229.7.2.vz7.9.17
------>
commit 005a6c6eabeb506bbe91dde48fcee4ef1a3903d1
Author: Maxim Patlasov <mpatlasov at virtuozzo.com>
Date:   Mon Dec 28 14:46:20 2015 +0400

    ploop: disable WRITE SAME for io_kaio
    
    kaio doesn't support WRITE SAME, so the patch disables it
    
    https://jira.sw.ru/browse/PSBM-41965
    
    Signed-off-by: Maxim Patlasov <mpatlasov at virtuozzo.com>
---
 drivers/block/ploop/io_kaio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/ploop/io_kaio.c b/drivers/block/ploop/io_kaio.c
index db900a3..79aa9af 100644
--- a/drivers/block/ploop/io_kaio.c
+++ b/drivers/block/ploop/io_kaio.c
@@ -946,6 +946,7 @@ static void kaio_unplug(struct ploop_io * io)
 static void kaio_queue_settings(struct ploop_io * io, struct request_queue * q)
 {
 	blk_set_stacking_limits(&q->limits);
+	blk_queue_max_write_same_sectors(q, 0);
 }
 
 static void kaio_issue_flush(struct ploop_io * io, struct ploop_request *preq)