linux-kernel - [PATCH 1/1] scsi: storvsc: Increase cmd_per

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Message-ID: <1516834132-26273-1-git-send-email-mikelley@ntdev.microsoft.com>
Date:   Wed, 24 Jan 2018 22:49:57 +0000
From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
To:     KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        Long Li <longli@...rosoft.com>,
        "jejb@...ux.vnet.ibm.com" <jejb@...ux.vnet.ibm.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
CC:     "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
Subject: [PATCH 1/1] scsi: storvsc: Increase cmd_per_lun for higher speed
 devices

Increase cmd_per_lun to allow more I/Os in progress per device,
particularly for NVMe's.  The Hyper-V host side can handle the
higher count with no issues.

Signed-off-by: Michael Kelley <mikelley@...rosoft.com>
---
 drivers/scsi/storvsc_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index f3264c4..6205107 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1657,7 +1657,7 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
 	.eh_timed_out =		storvsc_eh_timed_out,
 	.slave_alloc =		storvsc_device_alloc,
 	.slave_configure =	storvsc_device_configure,
-	.cmd_per_lun =		255,
+	.cmd_per_lun =		2048,
 	.this_id =		-1,
 	.use_clustering =	ENABLE_CLUSTERING,
 	/* Make sure we dont get a sg segment crosses a page boundary */
-- 
1.8.3.1