From: Yi Zou <yi.zou@intel.com>
To: linux-scsi@vger.kernel.org
Cc: Vasu Dev <vasu.dev@intel.com>, Yi Zou <yi.zou@intel.com>
Subject: [PATCH 6/6] fcoe: setup default initial value for DDP threshold
Date: Tue, 27 Sep 2011 21:38:18 -0700 [thread overview]
Message-ID: <20110928043818.13004.60518.stgit@localhost6.localdomain6> (raw)
In-Reply-To: <20110928043601.13004.92207.stgit@localhost6.localdomain6>
From: Vasu Dev <vasu.dev@intel.com>
Currently fcoe_ddp_min doesn't have default value
so by default not used, so setting up default value
as 4k as this works better by avoiding overhead
of programing DDP for small IOs.
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Yi Zou <yi.zou@intel.com>
---
drivers/scsi/fcoe/fcoe.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index cd203d7..430b2cd 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -52,7 +52,7 @@ MODULE_DESCRIPTION("FCoE");
MODULE_LICENSE("GPL v2");
/* Performance tuning parameters for fcoe */
-static unsigned int fcoe_ddp_min;
+static unsigned int fcoe_ddp_min = 4096;
module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
"Direct Data Placement (DDP).");
prev parent reply other threads:[~2011-09-28 4:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-28 4:37 [PATCH 0/6] Open-FCoE.org libfc and fcoe updates for scsi-misc Yi Zou
2011-09-28 4:37 ` [PATCH 1/6] fcoe: use kthread_create_on_node Yi Zou
2011-09-28 4:37 ` [PATCH 2/6] libfc: cache align struct fc_fcp_pkt fields Yi Zou
2011-09-28 4:38 ` [PATCH 3/6] libfc: cache align struct fc_exch fields Yi Zou
2011-09-28 4:38 ` [PATCH 4/6] libfc: cache align fc_exch_pool Yi Zou
2011-09-28 4:38 ` [PATCH 5/6] fcoe: use real dev in case of HW vlan acceleration Yi Zou
2011-09-28 4:38 ` Yi Zou [this message]
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