From patchwork Mon Sep 9 13:41:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13797070 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 38DC01BA263; Mon, 9 Sep 2024 13:43:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725889434; cv=none; b=n7wX2CqVkQIWkZTWmJ/DQHCGNcXpfbpK0Y6kTTBuTz4MWD9WrnoRtsslFLzvmcRQWO/UCVDeKv+yvQSfY9hmXkhQzYt7WoHC8GNilrwJzv9PvseiuOO7Nmbp++gWDb/XL36tevbtI7dePVnUeLM6MpTtnSLNex+0qNnhc+9JMbg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725889434; c=relaxed/simple; bh=Y6TWkZzkr6fJXfIzW5ghH0ju77NoPXhsGSxEbjnHY70=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aH3wRSZZ+zeA/4z5cIU8/4SXMTumHUok4iajgEDqbOdEAUWmeVOXnLnqnzOsbFuDABhoFfRKGoujkrnm9Grqvw67MsENu9Te2lRg7wMnXcqLFw8/KVd+Ai5BcgZDbeOqevaiCHjpNK6RYi8P4SgsDrCPQmm6AhNWq8vWqaQAqlM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4X2Sj20t8vz4f3jdh; Mon, 9 Sep 2024 21:43:34 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 6E77C1A161E; Mon, 9 Sep 2024 21:43:49 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgCn28eQ+95mhC1hAw--.55605S11; Mon, 09 Sep 2024 21:43:49 +0800 (CST) From: Yu Kuai To: jack@suse.cz, tj@kernel.org, josef@toxicpanda.com, axboe@kernel.dk, yukuai3@huawei.com Cc: cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH for-6.12 7/7] block, bfq: factor out a helper to split bfqq in bfq_init_rq() Date: Mon, 9 Sep 2024 21:41:54 +0800 Message-Id: <20240909134154.954924-8-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240909134154.954924-1-yukuai1@huaweicloud.com> References: <20240909134154.954924-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgCn28eQ+95mhC1hAw--.55605S11 X-Coremail-Antispam: 1UD129KBjvJXoWxCw4Uur4DGr4fCw4rWr1rJFb_yoWrurW3p3 W3Kw43Zr48JF4Ygr45J3W5Aw1fKr4fW3sxKrWfX34rJryDJwnavFn0yw1rXF4S9rWkJrnx Zr1Fq3yDCr4xJFDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmI14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkE bVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67 AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI 42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCw CI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnI WIevJa73UjIFyTuYvjfUOyIUUUUUU X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ From: Yu Kuai Make code cleaner, there are no functional changes. Signed-off-by: Yu Kuai --- block/bfq-iosched.c | 109 +++++++++++++++++++++++--------------------- 1 file changed, 58 insertions(+), 51 deletions(-) diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c index 7936e8bc166a..0747d9d0e48c 100644 --- a/block/bfq-iosched.c +++ b/block/bfq-iosched.c @@ -6737,11 +6737,10 @@ bfq_split_bfqq(struct bfq_io_cq *bic, struct bfq_queue *bfqq) return NULL; } -static struct bfq_queue *bfq_get_bfqq_handle_split(struct bfq_data *bfqd, - struct bfq_io_cq *bic, - struct bio *bio, - bool split, bool is_sync, - bool *new_queue) +static struct bfq_queue * +__bfq_get_bfqq_handle_split(struct bfq_data *bfqd, struct bfq_io_cq *bic, + struct bio *bio, bool split, bool is_sync, + bool *new_queue) { unsigned int act_idx = bfq_actuator_index(bfqd, bio); struct bfq_queue *bfqq = bic_to_bfqq(bic, is_sync, act_idx); @@ -6845,6 +6844,59 @@ static struct bfq_queue *bfq_waker_bfqq(struct bfq_queue *bfqq) return waker_bfqq; } +static struct bfq_queue *bfq_get_bfqq_handle_split(struct bfq_data *bfqd, + struct bfq_io_cq *bic, + struct bio *bio, + unsigned int idx, + bool is_sync) +{ + struct bfq_queue *waker_bfqq; + struct bfq_queue *bfqq; + bool new_queue = false; + + bfqq = __bfq_get_bfqq_handle_split(bfqd, bic, bio, false, is_sync, + &new_queue); + if (unlikely(new_queue)) + return bfqq; + + /* If the queue was seeky for too long, break it apart. */ + if (!bfq_bfqq_coop(bfqq) || !bfq_bfqq_split_coop(bfqq) || + bic->bfqq_data[idx].stably_merged) + return bfqq; + + waker_bfqq = bfq_waker_bfqq(bfqq); + + /* Update bic before losing reference to bfqq */ + if (bfq_bfqq_in_large_burst(bfqq)) + bic->bfqq_data[idx].saved_in_large_burst = true; + + bfqq = bfq_split_bfqq(bic, bfqq); + if (bfqq) { + bfq_bfqq_resume_state(bfqq, bfqd, bic, true); + return bfqq; + } + + bfqq = __bfq_get_bfqq_handle_split(bfqd, bic, bio, true, is_sync, NULL); + if (unlikely(bfqq == &bfqd->oom_bfqq)) + return bfqq; + + bfq_bfqq_resume_state(bfqq, bfqd, bic, false); + bfqq->waker_bfqq = waker_bfqq; + bfqq->tentative_waker_bfqq = NULL; + + /* + * If the waker queue disappears, then new_bfqq->waker_bfqq must be + * reset. So insert new_bfqq into the + * woken_list of the waker. See + * bfq_check_waker for details. + */ + if (waker_bfqq) + hlist_add_head(&bfqq->woken_list_node, + &bfqq->waker_bfqq->woken_list); + + return bfqq; +} + /* * If needed, init rq, allocate bfq data structures associated with * rq, and increment reference counters in the destination bfq_queue @@ -6876,7 +6928,6 @@ static struct bfq_queue *bfq_init_rq(struct request *rq) struct bfq_io_cq *bic; const int is_sync = rq_is_sync(rq); struct bfq_queue *bfqq; - bool new_queue = false; unsigned int a_idx = bfq_actuator_index(bfqd, bio); if (unlikely(!rq->elv.icq)) @@ -6893,53 +6944,9 @@ static struct bfq_queue *bfq_init_rq(struct request *rq) return RQ_BFQQ(rq); bic = icq_to_bic(rq->elv.icq); - bfq_check_ioprio_change(bic, bio); - bfq_bic_update_cgroup(bic, bio); - - bfqq = bfq_get_bfqq_handle_split(bfqd, bic, bio, false, is_sync, - &new_queue); - - if (likely(!new_queue)) { - /* If the queue was seeky for too long, break it apart. */ - if (bfq_bfqq_coop(bfqq) && bfq_bfqq_split_coop(bfqq) && - !bic->bfqq_data[a_idx].stably_merged) { - struct bfq_queue *waker_bfqq = bfq_waker_bfqq(bfqq); - - /* Update bic before losing reference to bfqq */ - if (bfq_bfqq_in_large_burst(bfqq)) - bic->bfqq_data[a_idx].saved_in_large_burst = - true; - - bfqq = bfq_split_bfqq(bic, bfqq); - if (!bfqq) { - bfqq = bfq_get_bfqq_handle_split(bfqd, bic, bio, - true, is_sync, - NULL); - if (likely(bfqq != &bfqd->oom_bfqq)) { - bfq_bfqq_resume_state(bfqq, bfqd, bic, - false); - bfqq->waker_bfqq = waker_bfqq; - bfqq->tentative_waker_bfqq = NULL; - - /* - * If the waker queue disappears, then - * new_bfqq->waker_bfqq must be - * reset. So insert new_bfqq into the - * woken_list of the waker. See - * bfq_check_waker for details. - */ - if (waker_bfqq) - hlist_add_head( - &bfqq->woken_list_node, - &bfqq->waker_bfqq->woken_list); - } - } else { - bfq_bfqq_resume_state(bfqq, bfqd, bic, true); - } - } - } + bfqq = bfq_get_bfqq_handle_split(bfqd, bic, bio, a_idx, is_sync); bfqq_request_allocated(bfqq); bfqq->ref++;