From f9bdac31cf4b8609c1b241749b0ceb8f67c8685b Mon Sep 17 00:00:00 2001 From: Sumit Saxena Date: Thu, 14 Apr 2022 06:36:01 -0400 Subject: scsi: core: Increase max device queue_depth to 4096 The maximum SCSI device queue depth of 1024 is not sufficient for RAID volumes configured behind Broadcom RAID controllers. For a 16-drive RAID volume with a device queue depth limit of 1024, only 64 I/Os (1024/16) can be issued per drive. That is not sufficient to saturate the device. Link: https://lore.kernel.org/r/20220414103601.140687-1-sumit.saxena@broadcom.com Cc: Ming Lei Cc: Hannes Reinecke Cc: Bart Van Assche Cc: Sumanesh Samanta Signed-off-by: Sumit Saxena Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 211aace69c22..735b6c862b46 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -200,11 +200,11 @@ void scsi_finish_command(struct scsi_cmnd *cmd) /* - * 1024 is big enough for saturating fast SCSI LUNs. + * 4096 is big enough for saturating fast SCSI LUNs. */ int scsi_device_max_queue_depth(struct scsi_device *sdev) { - return min_t(int, sdev->host->can_queue, 1024); + return min_t(int, sdev->host->can_queue, 4096); } /** -- cgit v1.2.3-59-g8ed1b