From patchwork Wed Sep 4 08:42:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 11129637 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 8FA0B16B1 for ; Wed, 4 Sep 2019 08:43:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F0972339D for ; Wed, 4 Sep 2019 08:43:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="AizpY/OO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728196AbfIDInA (ORCPT ); Wed, 4 Sep 2019 04:43:00 -0400 Received: from esa4.hgst.iphmx.com ([216.71.154.42]:39226 "EHLO esa4.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726834AbfIDInA (ORCPT ); Wed, 4 Sep 2019 04:43:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1567586580; x=1599122580; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=qtVWwALxJeFLEm5MyqWAjj8rH1FAELNGevTMV0H6ZXk=; b=AizpY/OOU8V8qroDZC9GAQzE+WZtQ2M+tXozw/tcoUCcjjEvM66kOJZ3 4/4fPKb490e3G6M3ExnuFRPnKmyyIoqNeeiImyY08xjU8NgcKCaHo+B/c 0CblYZX1MBLAR92aoZo5Lg6rgkSDUnCcEXS+U0ZsPTFi7vgH9WYSH3bCB cEpxloSKZEyzn07UKoNb01MdVdQ37+IMc/CecHNiuKPmXX705UaDavUPF fH1GGlqFf19H+d+JVkXyZyM/CLFIAGrlXbWe7PwNAKRJ271UQcVE14fv0 umTTwjTLg2ULVHXyrZZ5x512ajhKmmuILMCMNwJ10tjl+EhtaHFQRnmm1 w==; IronPort-SDR: uz3MnwZ/a4iJzBgHgEgg0QK6lb4s6zDdmv7N+of/QB7SNHeFxZMMTFU4wD4ULt8wRiPWUsLKby hCa+yI95Yl9laDnkP8jzGkcIx4yElxauCymtpGZA8IvwLUNUrLsMSpXtmYJaiETWfvGId9Ds4j K+EhiI26vR8e3vWJNj+rFLWnkmL+AXKGUhxvGTv4FirANlf07a4+uGh3OOx6n0Ar9Ro/a+PT8R rjtk9FRLnwn3PAzh/Pa5qix77eNSVuEBBW+QJs3AZS5MGWw7iUFBSMnrmTdF2WCe9EIpqCVwCA s/Q= X-IronPort-AV: E=Sophos;i="5.64,465,1559491200"; d="scan'208";a="117374677" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 04 Sep 2019 16:42:49 +0800 IronPort-SDR: 0oSNPKM9hyUH+YHT3/k3dveijA7Vmp7C7+x6ZeBbBGq/iU5cwAoiFVohtHt8jinvcPIrF3hJKC kJIx3TiD6f6cccCsdlqAFRODLUSmO87g7BaZwPTJxTKRTDCC6BX9yi0GvVMg9N6DmyaXCp3e2G P8sV5cuudbCOYwaOoZF+EEoybCYwdGE/SOOQBfcRRwlUXTbIAfUIBTBl4W9XIPOXpEmuRkzJ1s gBxj91DlETJ+atVty7885UHeNqMiniMyefHwxEJsMJdPd3u/qDf4WsvLPgapLTHelC3CrFQWlc I+o7sOE3iWJmKycJ1tdssluE Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Sep 2019 01:39:48 -0700 IronPort-SDR: zyRqs9lkXoQT6UkPn9rQ6bjsnr3ldKkUQUxQyEkHJnbV/4PPb4wMp0RwKU/eJdxBuTxC87FXot PGkXHd4b7B1cu1tfk66bWDzDfhsJw7ur6ciapl1EejYilbkD0eOjF1MyvYnrop/TbKB57ncI92 la80YatRJJowklS9vv9jeE595tEZWkxSs6iNTZE/Sspvnx75YOfZ0f/9VSCjlGvIBJUW1JBCxb gHJkTQkDWlP7KoNrXso0C2MvEwjzLrjP8BQy4s9LLU8e1ls5bp4x8e+//5QGanid4RzA7twmpM wAM= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 04 Sep 2019 01:42:48 -0700 From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" Subject: [PATCH v3 1/7] block: Cleanup elevator_init_mq() use Date: Wed, 4 Sep 2019 17:42:41 +0900 Message-Id: <20190904084247.23338-2-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190904084247.23338-1-damien.lemoal@wdc.com> References: <20190904084247.23338-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Instead of checking a queue tag_set BLK_MQ_F_NO_SCHED flag before calling elevator_init_mq() to make sure that the queue supports IO scheduling, use the elevator.c function elv_support_iosched() in elevator_init_mq(). This does not introduce any functional change but ensure that elevator_init_mq() does the right thing based on the queue settings. Signed-off-by: Damien Le Moal Reviewed-by: Johannes Thumshirn Reviewed-by: Christoph Hellwig Reviewed-by: Ming Lei --- block/blk-mq.c | 8 +++----- block/elevator.c | 23 +++++++++++++---------- 2 files changed, 16 insertions(+), 15 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index b622029b19ea..13923630e00a 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2904,11 +2904,9 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set, blk_mq_add_queue_tag_set(set, q); blk_mq_map_swqueue(q); - if (!(set->flags & BLK_MQ_F_NO_SCHED)) { - ret = elevator_init_mq(q); - if (ret) - goto err_tag_set; - } + ret = elevator_init_mq(q); + if (ret) + goto err_tag_set; return q; diff --git a/block/elevator.c b/block/elevator.c index 86100de88883..4721834815bb 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -619,16 +619,26 @@ int elevator_switch_mq(struct request_queue *q, return ret; } +static inline bool elv_support_iosched(struct request_queue *q) +{ + if (q->tag_set && (q->tag_set->flags & BLK_MQ_F_NO_SCHED)) + return false; + return true; +} + /* - * For blk-mq devices, we default to using mq-deadline, if available, for single - * queue devices. If deadline isn't available OR we have multiple queues, - * default to "none". + * For blk-mq devices supporting IO scheduling, we default to using mq-deadline, + * if available, for single queue devices. If deadline isn't available OR we + * have multiple queues, default to "none". */ int elevator_init_mq(struct request_queue *q) { struct elevator_type *e; int err = 0; + if (!elv_support_iosched(q)) + return 0; + if (q->nr_hw_queues != 1) return 0; @@ -706,13 +716,6 @@ static int __elevator_change(struct request_queue *q, const char *name) return elevator_switch(q, e); } -static inline bool elv_support_iosched(struct request_queue *q) -{ - if (q->tag_set && (q->tag_set->flags & BLK_MQ_F_NO_SCHED)) - return false; - return true; -} - ssize_t elv_iosched_store(struct request_queue *q, const char *name, size_t count) {