From patchwork Wed May 3 23:06:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 679060 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC5A8C77B7F for ; Wed, 3 May 2023 23:07:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229713AbjECXHS (ORCPT ); Wed, 3 May 2023 19:07:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229693AbjECXHM (ORCPT ); Wed, 3 May 2023 19:07:12 -0400 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E9677A8D for ; Wed, 3 May 2023 16:07:11 -0700 (PDT) Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-63b4bf2d74aso4133306b3a.2 for ; Wed, 03 May 2023 16:07:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683155231; x=1685747231; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=3tDY/U8HCExb5CoLpw2PAmlBPqhNdqgt9QEMBrECLpc=; b=VkcSG/bmGSjqWBVWFHMCpmQNiuY7vv5zsjjYjK/D3J6L6hlHLDgKk/i95CtNSBVWUB Sm/sDYr4t2wMiWMBwhKsHn1L4vRJuZI0216el6Ef6txvmDoOoWcvIC96UJcG6Rj8Q4Fg 3KNiLr2CDZOZqTgUpEtXEcmn6uwinV2MN+qDMxNE8ANifQ8sDiMqe5BqpzK9L0v4dwFn Ej1zOtkySa+ntNiRlDR6qOAPORGOkXActSMfWSe11pa3pjw8Ujxpvrb/yaCAZtJJc1tE A3omoJC1NJkmLCN0vAq5Tkx2h2YlDyKHYHx5TzYJAAl5Gp4b6fbdfzdkUeVkdULiZPai 28ag== X-Gm-Message-State: AC+VfDxLbYQMAwISIv9zeOFhibSjzvq2lUfJAgbbn68KDmL0CwhkMhJf Dkq+5ecMTfNwKVGIzpBvqMA= X-Google-Smtp-Source: ACHHUZ4ZuXdydCNNCwKD0kXxlioEBwQiWYlw1QAkUZBCgeX472By4S2mke6rEw37rA0tv8i9NEKXAg== X-Received: by 2002:a05:6a00:1a4d:b0:641:d9b:a444 with SMTP id h13-20020a056a001a4d00b006410d9ba444mr194391pfv.31.1683155230652; Wed, 03 May 2023 16:07:10 -0700 (PDT) Received: from bvanassche-linux.mtv.corp.google.com ([2620:15c:211:201:2c3b:81e:ce21:2437]) by smtp.gmail.com with ESMTPSA id u3-20020a056a00158300b0063f3aac78b9sm19531603pfk.79.2023.05.03.16.07.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 May 2023 16:07:10 -0700 (PDT) From: Bart Van Assche To: "Martin K . Petersen" Cc: Jaegeuk Kim , Christoph Hellwig , linux-scsi@vger.kernel.org, Bart Van Assche , Ming Lei , Hannes Reinecke , John Garry , Mike Christie , "James E.J. Bottomley" Subject: [PATCH v2 4/5] scsi: core: Only kick the requeue list if necessary Date: Wed, 3 May 2023 16:06:53 -0700 Message-ID: <20230503230654.2441121-5-bvanassche@acm.org> X-Mailer: git-send-email 2.40.1.495.gc816e09b53d-goog In-Reply-To: <20230503230654.2441121-1-bvanassche@acm.org> References: <20230503230654.2441121-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Instead of running the request queue of each device associated with a host every 3 ms (BLK_MQ_RESOURCE_DELAY) while host error handling is in progress, run the request queue after error handling has finished. Cc: Christoph Hellwig Cc: Ming Lei Cc: Hannes Reinecke Cc: John Garry Cc: Mike Christie Signed-off-by: Bart Van Assche --- drivers/scsi/scsi_lib.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index e59eb0cbfc83..a34390d35f1d 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -122,11 +122,9 @@ static void scsi_mq_requeue_cmd(struct scsi_cmnd *cmd, unsigned long msecs) WARN_ON_ONCE(true); } - if (msecs) { - blk_mq_requeue_request(rq, false); + blk_mq_requeue_request(rq, false); + if (!scsi_host_in_recovery(cmd->device->host)) blk_mq_delay_kick_requeue_list(rq->q, msecs); - } else - blk_mq_requeue_request(rq, true); } /** @@ -165,7 +163,8 @@ static void __scsi_queue_insert(struct scsi_cmnd *cmd, int reason, bool unbusy) */ cmd->result = 0; - blk_mq_requeue_request(scsi_cmd_to_rq(cmd), true); + blk_mq_requeue_request(scsi_cmd_to_rq(cmd), + !scsi_host_in_recovery(cmd->device->host)); } /** @@ -462,10 +461,16 @@ void scsi_requeue_run_queue(struct work_struct *work) scsi_run_queue(q); } +/* + * Transfer requests from the requeue_list to from where these can be dispatched + * and run the request queues. + */ void scsi_run_host_queues(struct Scsi_Host *shost) { struct scsi_device *sdev; + shost_for_each_device(sdev, shost) + blk_mq_kick_requeue_list(sdev->request_queue); shost_for_each_device(sdev, shost) scsi_run_queue(sdev->request_queue); } @@ -499,6 +504,9 @@ static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd) static void scsi_run_queue_async(struct scsi_device *sdev) { + if (scsi_host_in_recovery(sdev->host)) + return; + if (scsi_target(sdev)->single_lun || !list_empty(&sdev->host->starved_list)) { kblockd_schedule_work(&sdev->requeue_work);