From patchwork Fri Jun 29 19:25:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josef Bacik X-Patchwork-Id: 10497387 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A055E60230 for ; Fri, 29 Jun 2018 19:28:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 910AE29754 for ; Fri, 29 Jun 2018 19:28:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 852442984F; Fri, 29 Jun 2018 19:28:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D7A3829754 for ; Fri, 29 Jun 2018 19:28:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935779AbeF2T1V (ORCPT ); Fri, 29 Jun 2018 15:27:21 -0400 Received: from mail-qk0-f195.google.com ([209.85.220.195]:44583 "EHLO mail-qk0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935780AbeF2TZ7 (ORCPT ); Fri, 29 Jun 2018 15:25:59 -0400 Received: by mail-qk0-f195.google.com with SMTP id i188-v6so5550309qkc.11 for ; Fri, 29 Jun 2018 12:25:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=wKru50GXpawbcdIy/JAmL8ctpAjcdHrI6DqT69SaPGM=; b=Ey96OizfDXCdQg4v1KNZqNhYjDfRY9sgn6zhH5DSzZWjYSq3DskGN9zfdFa8n5mFGD U4DJperBg1BWduuJegPyC5SFFGcxtQCFS33d/ZIBcwBWXNa1VTxA/Hjym4GyAsNXDlpv x1RNklZb5qrA9U0Ur70jc+2EHXLA68BgUyfMowxZupC9Re1EuE+09tnEUdIehSlcT2H2 OFfi2BFbaNfE1G9Es4kJvaPQKGsW4BPExeh40UPlv89m2xxDKAfuYOWHufRyHpkMTTI+ JOdCCPn25eVMCR0wELjBa95oDp8GYRRhl1eltFqB++Sd+4Zwovxky8XDeA3PMIWVlmwq Y0Vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=wKru50GXpawbcdIy/JAmL8ctpAjcdHrI6DqT69SaPGM=; b=FCpguny5HR8/1eDIbkRyL/1cQ0igQmfvYodNkXSyv4drnMq+VJvs9HJ5PmGb7mJrSW uv69i6sOQKhHLfVUTilER8v2PL+U0hj0QXqR7UA5Q/4BhqAk4j+I2Rhq2dAq8mefjLFo yo1n2upaI+4+IVQ/JT+MioJkjnUSk2sbzACxBs9gQq/4jK5Nw6Ac37UgT4hpVD/fG0lS wSp/WKCG2BFQvvEecqPK3/FzAFyMvbHvGEw9sKPCCvQyw7k6lcCSOylBQ66u/Kx0arzO p0ZBWgP3smPzdfZATX1hCu15PpCOwdVclblJK4aYOQw30NWsHKKkrX5AT+ebi0vrBelZ C6Fg== X-Gm-Message-State: APt69E2Wn02z/Xj2OJQqVKVmJPNEPITn3oVS+Ln59Q/vmWXmWec2kTAV aGluf1+mkwq94kKKhC0+Ycrvvg== X-Google-Smtp-Source: AAOMgpcjgGoRrvZq13WOlDsw/wuRrcG5TPkyVm42P9vvBCwupojihr3HoRl+Teb3/5xew5DP6nxCrQ== X-Received: by 2002:a37:ba04:: with SMTP id k4-v6mr13801428qkf.78.1530300359159; Fri, 29 Jun 2018 12:25:59 -0700 (PDT) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id 43-v6sm6049464qtu.0.2018.06.29.12.25.58 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 29 Jun 2018 12:25:58 -0700 (PDT) From: Josef Bacik To: axboe@kernel.dk, kernel-team@fb.com, linux-block@vger.kernel.org, akpm@linux-foundation.org, hannes@cmpxchg.org, tj@kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Josef Bacik Subject: [PATCH 10/14] block: remove external dependency on wbt_flags Date: Fri, 29 Jun 2018 15:25:38 -0400 Message-Id: <20180629192542.26649-11-josef@toxicpanda.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180629192542.26649-1-josef@toxicpanda.com> References: <20180629192542.26649-1-josef@toxicpanda.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Josef Bacik We don't really need to save this stuff in the core block code, we can just pass the bio back into the helpers later on to derive the same flags and update the rq->wbt_flags appropriately. Signed-off-by: Josef Bacik --- block/blk-core.c | 9 ++++----- block/blk-mq.c | 9 ++++----- block/blk-rq-qos.c | 24 +++++++++++++++--------- block/blk-rq-qos.h | 11 ++++++----- block/blk-wbt.c | 52 +++++++++++++++++++++++++++++++++++++++------------- block/blk-wbt.h | 5 ----- 6 files changed, 68 insertions(+), 42 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 07594fb34c0f..af67fa68f635 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -42,7 +42,7 @@ #include "blk.h" #include "blk-mq.h" #include "blk-mq-sched.h" -#include "blk-wbt.h" +#include "blk-rq-qos.h" #ifdef CONFIG_DEBUG_FS struct dentry *blk_debugfs_root; @@ -1994,7 +1994,6 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) int where = ELEVATOR_INSERT_SORT; struct request *req, *free; unsigned int request_count = 0; - unsigned int wb_acct; /* * low level driver can indicate that it wants pages above a @@ -2052,7 +2051,7 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) } get_rq: - wb_acct = rq_qos_throttle(q, bio, q->queue_lock); + rq_qos_throttle(q, bio, q->queue_lock); /* * Grab a free request. This is might sleep but can not fail. @@ -2062,7 +2061,7 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) req = get_request(q, bio->bi_opf, bio, 0, GFP_NOIO); if (IS_ERR(req)) { blk_queue_exit(q); - rq_qos_cleanup(q, wb_acct); + rq_qos_cleanup(q, bio); if (PTR_ERR(req) == -ENOMEM) bio->bi_status = BLK_STS_RESOURCE; else @@ -2071,7 +2070,7 @@ static blk_qc_t blk_queue_bio(struct request_queue *q, struct bio *bio) goto out_unlock; } - wbt_track(req, wb_acct); + rq_qos_track(q, req, bio); /* * After dropping the lock and possibly sleeping here, our request diff --git a/block/blk-mq.c b/block/blk-mq.c index 5308396ee22a..7c55c9d35492 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -34,8 +34,8 @@ #include "blk-mq-debugfs.h" #include "blk-mq-tag.h" #include "blk-stat.h" -#include "blk-wbt.h" #include "blk-mq-sched.h" +#include "blk-rq-qos.h" static bool blk_mq_poll(struct request_queue *q, blk_qc_t cookie); static void blk_mq_poll_stats_start(struct request_queue *q); @@ -1852,7 +1852,6 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) struct blk_plug *plug; struct request *same_queue_rq = NULL; blk_qc_t cookie; - unsigned int wb_acct; blk_queue_bounce(q, &bio); @@ -1868,19 +1867,19 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio) if (blk_mq_sched_bio_merge(q, bio)) return BLK_QC_T_NONE; - wb_acct = rq_qos_throttle(q, bio, NULL); + rq_qos_throttle(q, bio, NULL); trace_block_getrq(q, bio, bio->bi_opf); rq = blk_mq_get_request(q, bio, bio->bi_opf, &data); if (unlikely(!rq)) { - rq_qos_cleanup(q, wb_acct); + rq_qos_cleanup(q, bio); if (bio->bi_opf & REQ_NOWAIT) bio_wouldblock_error(bio); return BLK_QC_T_NONE; } - wbt_track(rq, wb_acct); + rq_qos_track(q, rq, bio); cookie = request_to_qc_t(data.hctx, rq); diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c index d2f2af8aa10c..b7b02e04f64f 100644 --- a/block/blk-rq-qos.c +++ b/block/blk-rq-qos.c @@ -1,7 +1,5 @@ #include "blk-rq-qos.h" -#include "blk-wbt.h" - /* * Increment 'v', if 'v' is below 'below'. Returns true if we succeeded, * false if 'v' + 1 would be bigger than 'below'. @@ -29,13 +27,13 @@ bool rq_wait_inc_below(struct rq_wait *rq_wait, int limit) return atomic_inc_below(&rq_wait->inflight, limit); } -void rq_qos_cleanup(struct request_queue *q, enum wbt_flags wb_acct) +void rq_qos_cleanup(struct request_queue *q, struct bio *bio) { struct rq_qos *rqos; for (rqos = q->rq_qos; rqos; rqos = rqos->next) { if (rqos->ops->cleanup) - rqos->ops->cleanup(rqos, wb_acct); + rqos->ops->cleanup(rqos, bio); } } @@ -69,17 +67,25 @@ void rq_qos_requeue(struct request_queue *q, struct request *rq) } } -enum wbt_flags rq_qos_throttle(struct request_queue *q, struct bio *bio, - spinlock_t *lock) +void rq_qos_throttle(struct request_queue *q, struct bio *bio, + spinlock_t *lock) { struct rq_qos *rqos; - enum wbt_flags flags = 0; for(rqos = q->rq_qos; rqos; rqos = rqos->next) { if (rqos->ops->throttle) - flags |= rqos->ops->throttle(rqos, bio, lock); + rqos->ops->throttle(rqos, bio, lock); + } +} + +void rq_qos_track(struct request_queue *q, struct request *rq, struct bio *bio) +{ + struct rq_qos *rqos; + + for(rqos = q->rq_qos; rqos; rqos = rqos->next) { + if (rqos->ops->track) + rqos->ops->track(rqos, rq, bio); } - return flags; } /* diff --git a/block/blk-rq-qos.h b/block/blk-rq-qos.h index f9a39bd6ece3..a6d13b8ce0dc 100644 --- a/block/blk-rq-qos.h +++ b/block/blk-rq-qos.h @@ -25,12 +25,12 @@ struct rq_qos { }; struct rq_qos_ops { - enum wbt_flags (*throttle)(struct rq_qos *, struct bio *, - spinlock_t *); + void (*throttle)(struct rq_qos *, struct bio *, spinlock_t *); + void (*track)(struct rq_qos *, struct request *, struct bio *); void (*issue)(struct rq_qos *, struct request *); void (*requeue)(struct rq_qos *, struct request *); void (*done)(struct rq_qos *, struct request *); - void (*cleanup)(struct rq_qos *, enum wbt_flags); + void (*cleanup)(struct rq_qos *, struct bio *); void (*exit)(struct rq_qos *); }; @@ -97,10 +97,11 @@ void rq_depth_scale_up(struct rq_depth *rqd); void rq_depth_scale_down(struct rq_depth *rqd, bool hard_throttle); bool rq_depth_calc_max_depth(struct rq_depth *rqd); -void rq_qos_cleanup(struct request_queue *, enum wbt_flags); +void rq_qos_cleanup(struct request_queue *, struct bio *); void rq_qos_done(struct request_queue *, struct request *); void rq_qos_issue(struct request_queue *, struct request *); void rq_qos_requeue(struct request_queue *, struct request *); -enum wbt_flags rq_qos_throttle(struct request_queue *, struct bio *, spinlock_t *); +void rq_qos_throttle(struct request_queue *, struct bio *, spinlock_t *); +void rq_qos_track(struct request_queue *q, struct request *, struct bio *); void rq_qos_exit(struct request_queue *); #endif diff --git a/block/blk-wbt.c b/block/blk-wbt.c index 6fe20fb823e4..461a9af11efe 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -549,41 +549,66 @@ static inline bool wbt_should_throttle(struct rq_wb *rwb, struct bio *bio) } } +static enum wbt_flags bio_to_wbt_flags(struct rq_wb *rwb, struct bio *bio) +{ + enum wbt_flags flags = 0; + + if (bio_op(bio) == REQ_OP_READ) { + flags = WBT_READ; + } else if (wbt_should_throttle(rwb, bio)) { + if (current_is_kswapd()) + flags |= WBT_KSWAPD; + if (bio_op(bio) == REQ_OP_DISCARD) + flags |= WBT_DISCARD; + flags |= WBT_TRACKED; + } + return flags; +} + +static void wbt_cleanup(struct rq_qos *rqos, struct bio *bio) +{ + struct rq_wb *rwb = RQWB(rqos); + enum wbt_flags flags = bio_to_wbt_flags(rwb, bio); + __wbt_done(rqos, flags); +} + /* * Returns true if the IO request should be accounted, false if not. * May sleep, if we have exceeded the writeback limits. Caller can pass * in an irq held spinlock, if it holds one when calling this function. * If we do sleep, we'll release and re-grab it. */ -static enum wbt_flags wbt_wait(struct rq_qos *rqos, struct bio *bio, - spinlock_t *lock) +static void wbt_wait(struct rq_qos *rqos, struct bio *bio, spinlock_t *lock) { struct rq_wb *rwb = RQWB(rqos); - enum wbt_flags ret = 0; + enum wbt_flags flags; if (!rwb_enabled(rwb)) - return 0; + return; - if (bio_op(bio) == REQ_OP_READ) - ret = WBT_READ; + flags = bio_to_wbt_flags(rwb, bio); if (!wbt_should_throttle(rwb, bio)) { - if (ret & WBT_READ) + if (flags & WBT_READ) wb_timestamp(rwb, &rwb->last_issue); - return ret; + return; } if (current_is_kswapd()) - ret |= WBT_KSWAPD; + flags |= WBT_KSWAPD; if (bio_op(bio) == REQ_OP_DISCARD) - ret |= WBT_DISCARD; + flags |= WBT_DISCARD; - __wbt_wait(rwb, ret, bio->bi_opf, lock); + __wbt_wait(rwb, flags, bio->bi_opf, lock); if (!blk_stat_is_active(rwb->cb)) rwb_arm_timer(rwb); +} - return ret | WBT_TRACKED; +static void wbt_track(struct rq_qos *rqos, struct request *rq, struct bio *bio) +{ + struct rq_wb *rwb = RQWB(rqos); + rq->wbt_flags |= bio_to_wbt_flags(rwb, bio); } void wbt_issue(struct rq_qos *rqos, struct request *rq) @@ -707,9 +732,10 @@ EXPORT_SYMBOL_GPL(wbt_disable_default); static struct rq_qos_ops wbt_rqos_ops = { .throttle = wbt_wait, .issue = wbt_issue, + .track = wbt_track, .requeue = wbt_requeue, .done = wbt_done, - .cleanup = __wbt_done, + .cleanup = wbt_cleanup, .exit = wbt_exit, }; diff --git a/block/blk-wbt.h b/block/blk-wbt.h index 53b20a58c0a2..f47218d5b3b2 100644 --- a/block/blk-wbt.h +++ b/block/blk-wbt.h @@ -87,11 +87,6 @@ static inline unsigned int wbt_inflight(struct rq_wb *rwb) #ifdef CONFIG_BLK_WBT -static inline void wbt_track(struct request *rq, enum wbt_flags flags) -{ - rq->wbt_flags |= flags; -} - int wbt_init(struct request_queue *); void wbt_update_limits(struct request_queue *); void wbt_disable_default(struct request_queue *);