From: vikas.chaudhary@qlogic.com
To: James.Bottomley@suse.de
Cc: linux-scsi@vger.kernel.org, ravi.anand@qlogic.com,
lalit.chandivade@qlogic.com, vikas.chaudhary@qlogic.com
Subject: [PATCH 08/13] qla4xxx: Add support for ql4xmaxqdepth command line parameter
Date: Mon, 21 Mar 2011 03:34:31 -0700 [thread overview]
Message-ID: <1300703676-27398-8-git-send-email-vikas.chaudhary@qlogic.com> (raw)
In-Reply-To: <1300703676-27398-1-git-send-email-vikas.chaudhary@qlogic.com>
From: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
This provides the flexibility to modify the qdepth based on different
target devices to make the best use of system resources.
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
---
drivers/scsi/qla4xxx/ql4_os.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 277c45f..051c049 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -51,6 +51,11 @@ MODULE_PARM_DESC(ql4xenablemsix,
" 2 = enable MSI interrupt mechanism.");
#define QL4_DEF_QDEPTH 32
+static int ql4xmaxqdepth = QL4_DEF_QDEPTH;
+module_param(ql4xmaxqdepth, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ql4xmaxqdepth,
+ "Maximum queue depth to report for target devices.\n"
+ " Default: 32.");
/*
* SCSI host template entry points
@@ -1904,10 +1909,15 @@ static int qla4xxx_slave_alloc(struct scsi_device *sdev)
{
struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
struct ddb_entry *ddb = sess->dd_data;
+ int queue_depth = QL4_DEF_QDEPTH;
sdev->hostdata = ddb;
sdev->tagged_supported = 1;
- scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
+
+ if (ql4xmaxqdepth != 0 && ql4xmaxqdepth <= 0xffffU)
+ queue_depth = ql4xmaxqdepth;
+
+ scsi_activate_tcq(sdev, queue_depth);
return 0;
}
--
1.7.3.2
next prev parent reply other threads:[~2011-03-21 11:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-21 10:34 [PATCH 01/13] qla4xxx: cleanup qla4xxx_initialize_ddb_list() vikas.chaudhary
2011-03-21 10:34 ` [PATCH 02/13] qla4xxx: Do not send mbox command if FW is in failed state vikas.chaudhary
2011-03-21 10:34 ` [PATCH 03/13] qla4xxx: Do not retry ISP82XX initialization if H/W state is failed vikas.chaudhary
2011-03-21 10:34 ` [PATCH 04/13] qla4xxx: cleanup DDB relogin logic during initialization vikas.chaudhary
2011-03-21 10:34 ` [PATCH 05/13] qla4xxx: remove unused ddb flag DF_NO_RELOGIN vikas.chaudhary
2011-03-21 10:34 ` [PATCH 06/13] qla4xxx: Prevent other port reinitialization during remove_adapter vikas.chaudhary
2011-03-21 10:34 ` [PATCH 07/13] qla4xxx: cleanup function qla4xxx_process_ddb_changed vikas.chaudhary
2011-03-21 10:34 ` vikas.chaudhary [this message]
2011-03-21 10:34 ` [PATCH 09/13] qla4xxx: add support for ql4xsess_recovery_tmo cmd line param vikas.chaudhary
2011-03-21 10:34 ` [PATCH 10/13] qla4xxx: added new function qla4xxx_relogin_all_devices vikas.chaudhary
2011-03-21 10:34 ` [PATCH 12/13] qla4xxx: masking required bits of add_fw_options during initialization vikas.chaudhary
2011-03-21 10:34 ` [PATCH 13/13] qla4xxx: Update driver version to 5.02.00-k6 vikas.chaudhary
2011-03-23 14:44 ` [PATCH 01/13] qla4xxx: cleanup qla4xxx_initialize_ddb_list() James Bottomley
2011-03-23 15:10 ` Vikas Chaudhary
-- strict thread matches above, loose matches on Subject: below --
2011-03-14 5:24 [PATCH 08/13] qla4xxx: Add support for ql4xmaxqdepth command line parameter Vikas Chaudhary
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