From patchwork Wed Aug 28 02:29:41 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: 11117707 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 0F40F1800 for ; Wed, 28 Aug 2019 02:29:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E23BA2173E for ; Wed, 28 Aug 2019 02:29:51 +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="nA7KfzWE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726247AbfH1C3v (ORCPT ); Tue, 27 Aug 2019 22:29:51 -0400 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:27195 "EHLO esa1.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726178AbfH1C3u (ORCPT ); Tue, 27 Aug 2019 22:29:50 -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=1566959390; x=1598495390; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=Jnx10mJxJJVLtKURaXUM0JtZUxRwO0n/yri+8mElRJo=; b=nA7KfzWE8YY8+MnO0CW/MTuHR7Wy4KjabOl4UKOBgYXMWsNHcv/pWO1W e5l4ON8MhzIFoknC2/5iVHsuWdAg3hII48iPG2QzEw9IqDwoNi+3di3D8 m4gVb8w4nlby84nD9XNiTMKABubVzytUe1vXKN1AROYyaw7bLW6MKdPO0 EdV+jdRbG3/3eSuv5YZGCRUW506/V1NbkaM+amMyYUKcmmv3HcVHpciMt AW2wBELsIB7qJl4RFfWspSDjiiZs5YywP+oKkKlURdtE0rDZgxIOYRdv+ rukylCDU7qixtdQCjrLtJ9xu20SSecRYmZf3f0x3im3t7azezkkxtbkta w==; IronPort-SDR: WROYpWo7uKVV/aAeKy1F8COZfYqL+2ufX4JPlBlGTqTG4ELcirxB1WT4L7syUCPd13iCxsXKP/ /RwBFRO8RZThFP6m/5A4ILyOm306/TkzYAL7u2oApsXKS70KRpO+AGvYJIhasaE5SuqW8kWde5 IvpCJumXnr5I8aeWzBsPvuwDgz8X/MpcLQXN8NfW/Vh8iELflAtQJx9UrvuNGkEaan6AqHhN6t 4HHEMYOHZUB0tsN9UaPB74wl0Og7nFMhEO6bLClQhIT3bltPmWdV8KIUM0xEnJ1IDxcNbFWDb2 qoI= X-IronPort-AV: E=Sophos;i="5.64,439,1559491200"; d="scan'208";a="223475480" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 28 Aug 2019 10:29:49 +0800 IronPort-SDR: 3x3KY+foa19leborgWL98+XMABuHuYZpt2Q3zQVvlPqkw0RfdogqvCKrAAwXkCUfyTTbufglwn CNzVYy2WWp+8CDafb6DqpqYB24l3hYvAcPyp3QAz+IV+NrH1CqtSu4/sb7SXSPiSn3m2jj3E03 zBDkQCnxFVRhDBS/wzsmWzff4AudBThkR9jWSKgYCFDYYsAkngasm3YOurp087UASCmOfAx9mA b01auV1Je6LASJvHYiD70sCAyvHWgm7v32YxxnqLpCBk6w47C0TKAW44gWKvxIP+7PILvMz/qz AGhCigvwJ7JoRYlPikkCMbnB Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2019 19:27:00 -0700 IronPort-SDR: PUtsaQcfH4jRh+wiP72a432piAVR+WZPm/FSKMdYHNSlJf9WdxA8CqGw7M7rnqibsoHYGJ5SNr Xl2jd4h9cW2TcphycbLwt2Qn3SkIxYIoMhzZv5/Q77sUsg/xgHA+gIqhAb4PnOzT9oUFiGisTz rmRvQNhbaCFLyEAnybTXCW+nbiexUwYGKGIrOa+70iJGTLuzJRX8Qkng4xRvcKWcq7AYYQsQu5 Pxh7iSlXrn8QMs4s8ZxdQVtS0VqiT8Bd7wk9L/aKhtdUIvT3MPNYza73NThg5hUUriX+aNwl52 x8A= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip01.wdc.com with ESMTP; 27 Aug 2019 19:29:49 -0700 From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" Subject: [PATCH v2 1/7] block: Cleanup elevator_init_mq() use Date: Wed, 28 Aug 2019 11:29:41 +0900 Message-Id: <20190828022947.23364-2-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190828022947.23364-1-damien.lemoal@wdc.com> References: <20190828022947.23364-1-damien.lemoal@wdc.com> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@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 --- 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 f6620a30752e..de3aeafe48eb 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2895,11 +2895,9 @@ 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 4781c4205a5d..ab4d50c0ed43 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -633,16 +633,26 @@ 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; @@ -720,13 +730,6 @@ 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) {