[SCSI] zfcp: enable FCP hardware data router by default
authorSteffen Maier <maier@linux.vnet.ibm.com>
Thu, 22 Aug 2013 15:49:34 +0000 (17:49 +0200)
committerJames Bottomley <JBottomley@Parallels.com>
Tue, 3 Sep 2013 14:27:56 +0000 (07:27 -0700)
Enabling the data router support by default
can increase performance in certain situations.
It is safe to do so and tolerated in LPAR and under z/VM
in case there is no data router support in that environment.

Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
drivers/s390/scsi/zfcp_qdio.c

index 665e3cfaaf85d5b14859465163a3867073f2c5f5..f84fc1c348529a8977d024a6f9e9b8ac077a5881 100644 (file)
@@ -16,9 +16,9 @@
 
 #define QBUFF_PER_PAGE         (PAGE_SIZE / sizeof(struct qdio_buffer))
 
-static bool enable_multibuffer;
+static bool enable_multibuffer = 1;
 module_param_named(datarouter, enable_multibuffer, bool, 0400);
-MODULE_PARM_DESC(datarouter, "Enable hardware data router support");
+MODULE_PARM_DESC(datarouter, "Enable hardware data router support (default on)");
 
 static int zfcp_qdio_buffers_enqueue(struct qdio_buffer **sbal)
 {