From patchwork Wed Sep 21 09:53:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 12983554 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 8D851C6FA8E for ; Wed, 21 Sep 2022 09:42:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231646AbiIUJm0 (ORCPT ); Wed, 21 Sep 2022 05:42:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231372AbiIUJmY (ORCPT ); Wed, 21 Sep 2022 05:42:24 -0400 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55D48915E9; Wed, 21 Sep 2022 02:42:23 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4MXYLc47rQzlFXq; Wed, 21 Sep 2022 17:40:40 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.127.227]) by APP2 (Coremail) with SMTP id Syh0CgA3inN73CpjFoetBA--.3521S6; Wed, 21 Sep 2022 17:42:21 +0800 (CST) From: Yu Kuai To: tj@kernel.org, axboe@kernel.dk Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com Subject: [PATCH 2/2] blk-throttle: improve bypassing bios checkings Date: Wed, 21 Sep 2022 17:53:09 +0800 Message-Id: <20220921095309.1481289-3-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220921095309.1481289-1-yukuai1@huaweicloud.com> References: <20220921095309.1481289-1-yukuai1@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: Syh0CgA3inN73CpjFoetBA--.3521S6 X-Coremail-Antispam: 1UD129KBjvJXoWxXw1ktr1rtF4xKw4xWr15Arb_yoW5Xw47pF W7uF45Gr4jvFsxuwnxJF13XFW5Za97WrWSy395Xa1SyF43Kr93XFn5ZryUZaySvFZ3ua18 Zr42krWkCF1jgFDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUU9m14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jryl82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCF04k20xvY0x0EwIxGrwCFx2 IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v2 6r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67 AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IY s7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr 0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUc6pPUUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Yu Kuai "tg->has_rules" is extended to "tg->has_rules_iops/bps", thus bios that don't need to be throttled can be checked accurately. With this patch, bio will be throttled if: 1) Bio is read/write, and corresponding read/write iops limit exist. 2) If corresponding doesn't exist, corresponding bps limit exist and bio is not throttled before. Signed-off-by: Yu Kuai Acked-by: Tejun Heo --- block/blk-throttle.c | 13 +++++++++---- block/blk-throttle.h | 22 +++++++++++++++++++--- 2 files changed, 28 insertions(+), 7 deletions(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index a062539d84d0..78316955e30f 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -421,11 +421,16 @@ static void tg_update_has_rules(struct throtl_grp *tg) struct throtl_data *td = tg->td; int rw; - for (rw = READ; rw <= WRITE; rw++) - tg->has_rules[rw] = (parent_tg && parent_tg->has_rules[rw]) || + for (rw = READ; rw <= WRITE; rw++) { + tg->has_rules_iops[rw] = + (parent_tg && parent_tg->has_rules_iops[rw]) || (td->limit_valid[td->limit_index] && - (tg_bps_limit(tg, rw) != U64_MAX || - tg_iops_limit(tg, rw) != UINT_MAX)); + tg_iops_limit(tg, rw) != UINT_MAX); + tg->has_rules_bps[rw] = + (parent_tg && parent_tg->has_rules_bps[rw]) || + (td->limit_valid[td->limit_index] && + (tg_bps_limit(tg, rw) != U64_MAX)); + } } static void throtl_pd_online(struct blkg_policy_data *pd) diff --git a/block/blk-throttle.h b/block/blk-throttle.h index 3994b89dfa11..69f00012d616 100644 --- a/block/blk-throttle.h +++ b/block/blk-throttle.h @@ -98,7 +98,8 @@ struct throtl_grp { unsigned int flags; /* are there any throtl rules between this group and td? */ - bool has_rules[2]; + bool has_rules_bps[2]; + bool has_rules_iops[2]; /* internally used bytes per second rate limits */ uint64_t bps[2][LIMIT_CNT]; @@ -178,11 +179,26 @@ void blk_throtl_exit(struct request_queue *q); void blk_throtl_register_queue(struct request_queue *q); bool __blk_throtl_bio(struct bio *bio); void blk_throtl_cancel_bios(struct request_queue *q); -static inline bool blk_throtl_bio(struct bio *bio) + +static inline bool blk_should_throtl(struct bio *bio) { struct throtl_grp *tg = blkg_to_tg(bio->bi_blkg); + int rw = bio_data_dir(bio); + + /* iops limit is always counted */ + if (tg->has_rules_iops[rw]) + return true; + + if (tg->has_rules_bps[rw] && !bio_flagged(bio, BIO_BPS_THROTTLED)) + return true; + + return false; +} + +static inline bool blk_throtl_bio(struct bio *bio) +{ - if (!tg->has_rules[bio_data_dir(bio)]) + if (!blk_should_throtl(bio)) return false; return __blk_throtl_bio(bio);