From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steffen Maier Subject: [PATCH 8/8] zfcp: enable FCP hardware data router by default Date: Wed, 21 Aug 2013 17:05:31 +0200 Message-ID: <1377097531-4942-9-git-send-email-maier@linux.vnet.ibm.com> References: <1377097531-4942-1-git-send-email-maier@linux.vnet.ibm.com> Return-path: Received: from e06smtp11.uk.ibm.com ([195.75.94.107]:45215 "EHLO e06smtp11.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752351Ab3HUPHY (ORCPT ); Wed, 21 Aug 2013 11:07:24 -0400 Received: from /spool/local by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 21 Aug 2013 16:00:42 +0100 In-Reply-To: <1377097531-4942-1-git-send-email-maier@linux.vnet.ibm.com> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org, Martin Schwidefsky , Heiko Carstens , Steffen Maier 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 Reviewed-by: Martin Peschke --- drivers/s390/scsi/zfcp_qdio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -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) {