From: Mike Christie Date: Thu, 26 Jul 2007 17:46:47 +0000 (-0500) Subject: [SCSI] iscsi_tcp: Turn off bounce buffers X-Git-Tag: firefly_0821_release~27045^2~14 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b6d44fe9582b9d90a0b16f508ac08a90d899bf56;p=firefly-linux-kernel-4.4.55.git [SCSI] iscsi_tcp: Turn off bounce buffers It was found by LSI that on setups with large amounts of memory we were bouncing buffers when we did not need to. If the iscsi tcp code touches the data buffer (or a helper does), it will kmap the buffer. iscsi_tcp also does not interact with hardware, so it does not have any hw dma restrictions. This patch sets the bounce buffer settings for our device queue so buffers should not be bounced because of a driver limit. Signed-off-by: Mike Christie Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 93034b43effc..a21455d0274c 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -2216,6 +2216,7 @@ static void iscsi_tcp_session_destroy(struct iscsi_cls_session *cls_session) static int iscsi_tcp_slave_configure(struct scsi_device *sdev) { + blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_ANY); blk_queue_dma_alignment(sdev->request_queue, 0); return 0; }