From patchwork Wed Sep 11 12:53:40 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Gorenko X-Patchwork-Id: 11141041 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D1914924 for ; Wed, 11 Sep 2019 12:54:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B1ABD20863 for ; Wed, 11 Sep 2019 12:54:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727664AbfIKMyD (ORCPT ); Wed, 11 Sep 2019 08:54:03 -0400 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:53139 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727302AbfIKMyC (ORCPT ); Wed, 11 Sep 2019 08:54:02 -0400 Received: from Internal Mail-Server by MTLPINE1 (envelope-from sergeygo@mellanox.com) with ESMTPS (AES256-SHA encrypted); 11 Sep 2019 15:53:59 +0300 Received: from rsws38.mtr.labs.mlnx (rsws38.mtr.labs.mlnx [10.209.40.117]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id x8BCrxr5023616; Wed, 11 Sep 2019 15:53:59 +0300 From: Sergey Gorenko To: sagi@grimberg.me Cc: maxg@mellanox.com, linux-rdma@vger.kernel.org, Sergey Gorenko Subject: [PATCH] IB/iser: Support up to 16MB data transfer in a single command Date: Wed, 11 Sep 2019 12:53:40 +0000 Message-Id: <20190911125340.19017-1-sergeygo@mellanox.com> X-Mailer: git-send-email 2.17.2 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Maximum supported IO size is 8MB for the iSER driver. The current value is limited by the ISCSI_ISER_MAX_SG_TABLESIZE macro. But the driver is able to handle 16MB IOs without any significant changes. Increasing this limit can be useful for the storage arrays which are fine tuned for IOs larger than 8 MB. This commit allows to configure maximum IO size up to 16MB using the max_sectors module parameter. Signed-off-by: Sergey Gorenko Reviewed-by: Max Gurtovoy Acked-by: Sagi Grimberg --- drivers/infiniband/ulp/iser/iscsi_iser.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index 39bf213444cb..fe478c576846 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -103,8 +103,8 @@ /* Default support is 512KB I/O size */ #define ISER_DEF_MAX_SECTORS 1024 #define ISCSI_ISER_DEF_SG_TABLESIZE ((ISER_DEF_MAX_SECTORS * 512) >> SHIFT_4K) -/* Maximum support is 8MB I/O size */ -#define ISCSI_ISER_MAX_SG_TABLESIZE ((16384 * 512) >> SHIFT_4K) +/* Maximum support is 16MB I/O size */ +#define ISCSI_ISER_MAX_SG_TABLESIZE ((32768 * 512) >> SHIFT_4K) #define ISER_DEF_XMIT_CMDS_DEFAULT 512 #if ISCSI_DEF_XMIT_CMDS_MAX > ISER_DEF_XMIT_CMDS_DEFAULT