From patchwork Sun Oct 30 03:06:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinlong Chen X-Patchwork-Id: 12808 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp1615060wru; Sat, 29 Oct 2022 20:12:10 -0700 (PDT) X-Google-Smtp-Source: AMsMyM5fqWV01MuP0U/R/yY3xDQX6LDZ8ZtCS2pN8R4PwZum49OJ5O6LVoVMx7Zbys6UOqlqpwFp X-Received: by 2002:a17:907:84a:b0:733:735:2b1a with SMTP id ww10-20020a170907084a00b0073307352b1amr6381388ejb.290.1667099530193; Sat, 29 Oct 2022 20:12:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1667099530; cv=none; d=google.com; s=arc-20160816; b=VFLYezS9WiyQAH3bnoZMMZqDyznaod9gMW6eAGoVIUq72gr3n+X6683rLskcaO3qD8 Q5rmRMm09kUaU38RLk/YuambuDQoewaAYrNTL7lUyDHF8hrXxmPW7MRItfx4A+wwCbFG 4MVBGgkNxvMEqKOPeCQnCfQ9sQcOUaNGUKjsIWtki7AvOctK2KiCgJmqd07RiLldOJem RPnLEbzz1JNsmam9kXK773yOXfQOAbk0chiUY0b8GBazIFr8+GRIFuBbfH1RvOR3znpE NOSfe3DIA/NvpRTO9ryL2BvLxY2R897l886rpAYCxszJW0pOHpkPiT23MEyUNdNK+mEa TpLQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=guU7I8/Fyv1QeTbpUJXYQOQnRCzkJ8Z7VHbjR0OrACg=; b=F+ak4UXlz3GoeYsQ5FqA6SnvsvpfBcK0rZV7g4cQ4V7HVEXo6vQnukP+Hy19wFHYHG VMZXGvsBZeY3EZdRqAKlGImOJWW7ynEE8pWN5t9VoaOHHg0Eep4wM5cGrvICzZXj3gsr AZkJX9uqp8AIpwNLXZRx7w1LP90eYo0XtAyoBA5gdG5Cj9UPsXGvhPQ114KUXFSgKxjQ EqJ0Lj0dS+AKCxj9weQe4jF8bG0Dq1lrIb1JDojf57inb+uhARSI1ysh/i074IvEgMd3 Gx8zzCupbnesIpuY0IojhqUk2kRKU4os81Xh7dRF211EiNtnDDHVfTuhAPFxo9c1Ehvb zzrw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id sh31-20020a1709076e9f00b007a66031d2dbsi3828409ejc.718.2022.10.29.20.11.46; Sat, 29 Oct 2022 20:12:10 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229692AbiJ3DHl (ORCPT + 99 others); Sat, 29 Oct 2022 23:07:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229740AbiJ3DH2 (ORCPT ); Sat, 29 Oct 2022 23:07:28 -0400 Received: from zju.edu.cn (mail.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5FDB93609E; Sat, 29 Oct 2022 20:07:27 -0700 (PDT) Received: from localhost.localdomain (unknown [10.14.30.251]) by mail-app3 (Coremail) with SMTP id cC_KCgAXlrpJ6l1jv9B1CA--.27265S3; Sun, 30 Oct 2022 11:07:17 +0800 (CST) From: Jinlong Chen To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, nickyc975@zju.edu.cn Subject: [PATCH v2 1/3] blk-mq: remove redundant call to blk_freeze_queue_start in blk_mq_destroy_queue Date: Sun, 30 Oct 2022 11:06:46 +0800 Message-Id: <3a6d54a5adc8bd09aab28abfbe5f5b02bb863a8d.1667098953.git.nickyc975@zju.edu.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CM-TRANSID: cC_KCgAXlrpJ6l1jv9B1CA--.27265S3 X-Coremail-Antispam: 1UD129KBjvdXoW7JF48AFW3Gw48trW5Aw13Arb_yoWkGrb_Wa y8AF1qyFZ8GF15ur1jkF1rZF1vk3y8JFy7GFWDW3srJwn5Aan8A3y7Cr1rCr4UW3yjk3sr Wr1UG3s7Jr40qjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbs8Fc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AK wVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20x vE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1l84ACjcxK6I8E 87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1lnxkEFVAIw20F6c xK64vIFxWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2Wl Yx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbV WUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1l42xK82IYc2Ij 64vIr41l42xK82IY6x8ErcxFaVAv8VW8uw4UJr1UMxC20s026xCaFVCjc4AY6r1j6r4UMI 8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AK xVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI 8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280 aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43 ZEXa7VUbHa0DUUUUU== X-CM-SenderInfo: qssqjiaqqzq6lmxovvfxof0/1tbiAggTB1ZdtcKM4AADsN X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748080556775269136?= X-GMAIL-MSGID: =?utf-8?q?1748080556775269136?= The calling relationship in blk_mq_destroy_queue() is as follows: blk_mq_destroy_queue() ... -> blk_queue_start_drain() -> blk_freeze_queue_start() <- called ... -> blk_freeze_queue() -> blk_freeze_queue_start() <- called again -> blk_mq_freeze_queue_wait() So there is a redundant call to blk_freeze_queue_start(). Replace blk_freeze_queue() with blk_mq_freeze_queue_wait() to avoid the redundant call. Signed-off-by: Jinlong Chen --- block/blk-mq.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 4cecf281123f..14c4165511b9 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -4005,7 +4005,12 @@ void blk_mq_destroy_queue(struct request_queue *q) blk_queue_flag_set(QUEUE_FLAG_DYING, q); blk_queue_start_drain(q); - blk_freeze_queue(q); + + /* + * blk_freeze_queue_start has been called in blk_queue_start_drain, we just + * need to wait. + */ + blk_mq_freeze_queue_wait(q); blk_sync_queue(q); blk_mq_cancel_work_sync(q); From patchwork Sun Oct 30 03:06:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinlong Chen X-Patchwork-Id: 12807 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp1614794wru; Sat, 29 Oct 2022 20:11:07 -0700 (PDT) X-Google-Smtp-Source: AMsMyM4FuYAjxxgKAZtRgVE74h/LlR4W8n11FWDw/st+c/t92fonvViMhfGhxNFe1nQgURh4a7Cq X-Received: by 2002:a05:6402:12d1:b0:463:3f0c:be02 with SMTP id k17-20020a05640212d100b004633f0cbe02mr736259edx.239.1667099467173; Sat, 29 Oct 2022 20:11:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1667099467; cv=none; d=google.com; s=arc-20160816; b=HrICgzxSuwcgxEEfR53o/JEYeE6G33p8vXdqyECh3lBAG7U+HiHIxH9lhOoGqtxiHg kHepTbHlHN0z2XM37irHO8UjAZKXAl7S3omUpYwZ7Ke+LtIMDbiD4H/XBLyeRjl2oWaA moYSGsPIqml0VGeek970VjHSyTjogBfQ5D8yQVjLUmSjzudxaPR6NMYsmwiF+/d0K9tX 6uvAWPhe8znOOGgascvs7eBvaRK1DgyAmJ2V1amNdqNDKBtHfuOfSsI/X8hnNoWcJQps cseXou8A0lGed9rvvyZ69B99ku9xC5wFgo8FBEF3Eqh+XNMixQQFadHLRmbtk8NQmCgX xIzg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=Zw9CjljdymJxQA8GSqf36K/IXuBD8Q74dv97X7w68n4=; b=cDhh4lTvbmfcem/nCOajDtz4jKYIpAn9d3BbWJ1/0aR6Zp59sHeRe7iOF5IflBAI5S YH+rFDUHOgUpy485V1935G6fYohDR21OoZGWZCKyHPLBviG37Zpntpjouu4AzZXBv+8M STkg3TozXh0GiK2UUzUZLpgiDcj1ZCsKqxSnJqIiMeH4Zb5ynw3xda2Jgkhwm9pP4oeL nEW8soqnzkIQzoUhHmA+mnoOMD/HB98dWX4FshnbQOxPp/lc17dmEjTJwmm844kWuK45 5sx9MsFEmjt7KaVWd8PymB4JQYjFDdnIqQ8wkAAYl5KbVka9CGlMt0kpmy4eLlIa27Ij Hbng== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id wt5-20020a170906ee8500b0073da5c8de1asi3057881ejb.178.2022.10.29.20.10.43; Sat, 29 Oct 2022 20:11:07 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229756AbiJ3DHf (ORCPT + 99 others); Sat, 29 Oct 2022 23:07:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60502 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbiJ3DH1 (ORCPT ); Sat, 29 Oct 2022 23:07:27 -0400 Received: from zju.edu.cn (spam.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id ED230360A1; Sat, 29 Oct 2022 20:07:25 -0700 (PDT) Received: from localhost.localdomain (unknown [10.14.30.251]) by mail-app3 (Coremail) with SMTP id cC_KCgAXlrpJ6l1jv9B1CA--.27265S4; Sun, 30 Oct 2022 11:07:18 +0800 (CST) From: Jinlong Chen To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, nickyc975@zju.edu.cn Subject: [PATCH v2 2/3] blk-mq: remove blk_freeze_queue Date: Sun, 30 Oct 2022 11:06:47 +0800 Message-Id: X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CM-TRANSID: cC_KCgAXlrpJ6l1jv9B1CA--.27265S4 X-Coremail-Antispam: 1UD129KBjvJXoW7uFy3AF4rXr18ZrWruFyrtFb_yoW8Zr1xpF ZxJF47Cw1Iqr4UXrW8Jw47Xr9Iga18Kry7C3ySy3yYvrnIkFn2vF18A3W8uF40yrZ5JFsr ZrWqgrZxAr18CrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvq1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2 z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2vYz4IE04k24V AvwVAKI4IrM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xf McIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7 v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxAIw28IcxkI 7VAKI48JMxAIw28IcVCjz48v1sIEY20_GFWkJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2 jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0x ZFpf9x0JUQZ23UUUUU= X-CM-SenderInfo: qssqjiaqqzq6lmxovvfxof0/1tbiAgUTB1ZdtcKOmwAAs6 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748080490516259904?= X-GMAIL-MSGID: =?utf-8?q?1748080490516259904?= Nobody is calling blk_freeze_queue except its alias, so remove it. Signed-off-by: Jinlong Chen --- block/blk-mq.c | 18 +----------------- block/blk.h | 1 - 2 files changed, 1 insertion(+), 18 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 14c4165511b9..e0654a2e80b9 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -194,27 +194,11 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_wait_timeout); * Guarantee no request is in use, so we can change any data structure of * the queue afterward. */ -void blk_freeze_queue(struct request_queue *q) +void blk_mq_freeze_queue(struct request_queue *q) { - /* - * In the !blk_mq case we are only calling this to kill the - * q_usage_counter, otherwise this increases the freeze depth - * and waits for it to return to zero. For this reason there is - * no blk_unfreeze_queue(), and blk_freeze_queue() is not - * exported to drivers as the only user for unfreeze is blk_mq. - */ blk_freeze_queue_start(q); blk_mq_freeze_queue_wait(q); } - -void blk_mq_freeze_queue(struct request_queue *q) -{ - /* - * ...just an alias to keep freeze and unfreeze actions balanced - * in the blk_mq_* namespace - */ - blk_freeze_queue(q); -} EXPORT_SYMBOL_GPL(blk_mq_freeze_queue); void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic) diff --git a/block/blk.h b/block/blk.h index 7f9e089ab1f7..e9addea2838a 100644 --- a/block/blk.h +++ b/block/blk.h @@ -37,7 +37,6 @@ struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, gfp_t flags); void blk_free_flush_queue(struct blk_flush_queue *q); -void blk_freeze_queue(struct request_queue *q); void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic); void blk_queue_start_drain(struct request_queue *q); int __bio_queue_enter(struct request_queue *q, struct bio *bio); From patchwork Sun Oct 30 03:06:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinlong Chen X-Patchwork-Id: 12809 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:6687:0:0:0:0:0 with SMTP id l7csp1617240wru; Sat, 29 Oct 2022 20:17:41 -0700 (PDT) X-Google-Smtp-Source: AMsMyM75K6HkERy3Z4RHfj00BNOloBKk/46TxetLKE1FUdXNrTZ5MMFo+jU7CgUitkiyCCN6I4dk X-Received: by 2002:a05:6402:8cc:b0:45c:a5c9:c0a with SMTP id d12-20020a05640208cc00b0045ca5c90c0amr6773231edz.135.1667099861665; Sat, 29 Oct 2022 20:17:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1667099861; cv=none; d=google.com; s=arc-20160816; b=lrH6SzO6Xb/UnmFP39IIz3UUIybxczP2W29hPRwBFi7p1geoCKxNutjrknOFc2y2hq gNLpWgwJQVPKq/3Xk5GjOe7/91p5i3J3m3SoCTAY6WQvcjY4LZc7Xgw6+Lar2GI4QDKK 1pj9UB32f3WE/Is1EEMxbOSTP8f5alqdzd/HctN7HqQHHSFzugPeFiGvrC0RNkDIopJs q2c6U+fNF14m8Z/OUgd0JXqr9lsVDtS5WcWz2F3pJ3A8kvsSVBLfSGaktDgWqOqdltFh ZhdsYWZSOr3Pg+6H5OwAUK95UbYlblD9lU895o8afpD1ubn5PTmKldfjhmXjcFeIRJhy ubcA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=ayrnYu7xAqKNsYJn/4yLotE7DaelTIhvopEludcEbh0=; b=CyjhauIKV8lhW1zIMSlSu4s6eMDv+lP+qxs4udH2KlOTTZyesq5Jwt47qmqyrESZsP 4Mgi5hYgF4UyESznwXmsTYHWlJUYeTsGfpbhEpL8Za7Y2ctZy9Yw/yG/C8k6NfzxqqJm SNXtAWtRw7iiRqaHgMgdLNYlmequhQuN5WGsPaIF1zOkULhpNn0VAPV6Rz4RiuB5C9lD GPRExWIHvV74pr43GLxEb7pNIPJ8AOGpoOEXcDCFIuDHtVfv0eNCjQir/7L6QY37yVva EPNqp1ZeMqjfz3o+Ll8xQXEBkplca3E/qBbTTFbETRakw/YwkLYNIymi6rQ2Oa+K5b3U 1zIA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id o11-20020a509b0b000000b004604906b23csi2924208edi.545.2022.10.29.20.17.16; Sat, 29 Oct 2022 20:17:41 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229740AbiJ3DHt (ORCPT + 99 others); Sat, 29 Oct 2022 23:07:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229744AbiJ3DHa (ORCPT ); Sat, 29 Oct 2022 23:07:30 -0400 Received: from zju.edu.cn (mail.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 56F65360A1; Sat, 29 Oct 2022 20:07:28 -0700 (PDT) Received: from localhost.localdomain (unknown [10.14.30.251]) by mail-app3 (Coremail) with SMTP id cC_KCgAXlrpJ6l1jv9B1CA--.27265S5; Sun, 30 Oct 2022 11:07:19 +0800 (CST) From: Jinlong Chen To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, nickyc975@zju.edu.cn Subject: [PATCH v2 3/3] block: hide back blk_freeze_queue_start and export its blk-mq alias Date: Sun, 30 Oct 2022 11:06:48 +0800 Message-Id: <3f2b51cc7f5c21e49bfa089e594cb203a4015183.1667098953.git.nickyc975@zju.edu.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 X-CM-TRANSID: cC_KCgAXlrpJ6l1jv9B1CA--.27265S5 X-Coremail-Antispam: 1UD129KBjvJXoW3Xr1xCw1UZF4rGF45Ary5Arb_yoW7Kry8pF ZxXa13Aw10gr4UXrW8Jw47Zr9xKw4vg347C3yftryYvrn8Kas3ZF17A3W5XF48ArWkCFs8 ArWDKrsrCr18JrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUvq1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2 z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2vYz4IE04k24V AvwVAKI4IrM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xf McIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7 v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxAIw28IcxkI 7VAKI48JMxAIw28IcVCjz48v1sIEY20_GFWkJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8Jw C20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAF wI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjx v20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2 jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0x ZFpf9x0JUQZ23UUUUU= X-CM-SenderInfo: qssqjiaqqzq6lmxovvfxof0/1tbiAgUTB1ZdtcKOnAABs8 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1748080904468559240?= X-GMAIL-MSGID: =?utf-8?q?1748080904468559240?= blk_freeze_queue_start is used internally for universal queue draining and externally for blk-mq specific queue freezing. Keep the non-blk-mq name private and export a blk-mq alias to users. Signed-off-by: Jinlong Chen --- block/blk-core.c | 13 +++++++++++++ block/blk-mq.c | 27 ++++++++++++++------------- block/blk-pm.c | 2 +- block/blk.h | 1 + drivers/nvme/host/core.c | 2 +- drivers/nvme/host/multipath.c | 2 +- include/linux/blk-mq.h | 2 +- 7 files changed, 32 insertions(+), 17 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 5d50dd16e2a5..d3dd439a8ed4 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -269,6 +269,19 @@ void blk_put_queue(struct request_queue *q) } EXPORT_SYMBOL(blk_put_queue); +void blk_freeze_queue_start(struct request_queue *q) +{ + mutex_lock(&q->mq_freeze_lock); + if (++q->mq_freeze_depth == 1) { + percpu_ref_kill(&q->q_usage_counter); + mutex_unlock(&q->mq_freeze_lock); + if (queue_is_mq(q)) + blk_mq_run_hw_queues(q, false); + } else { + mutex_unlock(&q->mq_freeze_lock); + } +} + void blk_queue_start_drain(struct request_queue *q) { /* diff --git a/block/blk-mq.c b/block/blk-mq.c index e0654a2e80b9..d638bd0fb4d8 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -161,19 +161,20 @@ void blk_mq_in_flight_rw(struct request_queue *q, struct block_device *part, inflight[1] = mi.inflight[1]; } -void blk_freeze_queue_start(struct request_queue *q) +void blk_mq_freeze_queue_start(struct request_queue *q) { - mutex_lock(&q->mq_freeze_lock); - if (++q->mq_freeze_depth == 1) { - percpu_ref_kill(&q->q_usage_counter); - mutex_unlock(&q->mq_freeze_lock); - if (queue_is_mq(q)) - blk_mq_run_hw_queues(q, false); - } else { - mutex_unlock(&q->mq_freeze_lock); - } + /* + * Warn on non-blk-mq usages. + */ + WARN_ON_ONCE(!queue_is_mq(q)); + + /* + * Just an alias of blk_freeze_queue_start to keep the consistency of the + * blk_mq_* namespace. + */ + blk_freeze_queue_start(q); } -EXPORT_SYMBOL_GPL(blk_freeze_queue_start); +EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_start); void blk_mq_freeze_queue_wait(struct request_queue *q) { @@ -196,7 +197,7 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue_wait_timeout); */ void blk_mq_freeze_queue(struct request_queue *q) { - blk_freeze_queue_start(q); + blk_mq_freeze_queue_start(q); blk_mq_freeze_queue_wait(q); } EXPORT_SYMBOL_GPL(blk_mq_freeze_queue); @@ -1570,7 +1571,7 @@ static void blk_mq_timeout_work(struct work_struct *work) * percpu_ref_tryget directly, because we need to be able to * obtain a reference even in the short window between the queue * starting to freeze, by dropping the first reference in - * blk_freeze_queue_start, and the moment the last request is + * blk_mq_freeze_queue_start, and the moment the last request is * consumed, marked by the instant q_usage_counter reaches * zero. */ diff --git a/block/blk-pm.c b/block/blk-pm.c index 2dad62cc1572..ae2b950ed45d 100644 --- a/block/blk-pm.c +++ b/block/blk-pm.c @@ -80,7 +80,7 @@ int blk_pre_runtime_suspend(struct request_queue *q) blk_set_pm_only(q); ret = -EBUSY; /* Switch q_usage_counter from per-cpu to atomic mode. */ - blk_freeze_queue_start(q); + blk_mq_freeze_queue_start(q); /* * Wait until atomic mode has been reached. Since that * involves calling call_rcu(), it is guaranteed that later diff --git a/block/blk.h b/block/blk.h index e9addea2838a..ee576bb74382 100644 --- a/block/blk.h +++ b/block/blk.h @@ -37,6 +37,7 @@ struct blk_flush_queue *blk_alloc_flush_queue(int node, int cmd_size, gfp_t flags); void blk_free_flush_queue(struct blk_flush_queue *q); +void blk_freeze_queue_start(struct request_queue *q); void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic); void blk_queue_start_drain(struct request_queue *q); int __bio_queue_enter(struct request_queue *q, struct bio *bio); diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 0090dc0b3ae6..e2d5c54c651a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -5199,7 +5199,7 @@ void nvme_start_freeze(struct nvme_ctrl *ctrl) down_read(&ctrl->namespaces_rwsem); list_for_each_entry(ns, &ctrl->namespaces, list) - blk_freeze_queue_start(ns->queue); + blk_mq_freeze_queue_start(ns->queue); up_read(&ctrl->namespaces_rwsem); } EXPORT_SYMBOL_GPL(nvme_start_freeze); diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index 0ea7e441e080..3bb358bd0cde 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -77,7 +77,7 @@ void nvme_mpath_start_freeze(struct nvme_subsystem *subsys) lockdep_assert_held(&subsys->lock); list_for_each_entry(h, &subsys->nsheads, entry) if (h->disk) - blk_freeze_queue_start(h->disk->queue); + blk_mq_freeze_queue_start(h->disk->queue); } void nvme_failover_req(struct request *req) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 569053ed959d..8600d4b4aa80 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -887,7 +887,7 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, void blk_mq_tagset_wait_completed_request(struct blk_mq_tag_set *tagset); void blk_mq_freeze_queue(struct request_queue *q); void blk_mq_unfreeze_queue(struct request_queue *q); -void blk_freeze_queue_start(struct request_queue *q); +void blk_mq_freeze_queue_start(struct request_queue *q); void blk_mq_freeze_queue_wait(struct request_queue *q); int blk_mq_freeze_queue_wait_timeout(struct request_queue *q, unsigned long timeout);