From patchwork Tue Jun 30 02:23:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 11632979 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 52ABC6C1 for ; Tue, 30 Jun 2020 02:24:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1878520722 for ; Tue, 30 Jun 2020 02:24:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="do3GDw0t" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728326AbgF3CYS (ORCPT ); Mon, 29 Jun 2020 22:24:18 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:35412 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726288AbgF3CYS (ORCPT ); Mon, 29 Jun 2020 22:24:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593483856; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aJgJMHFDcfsXtv+eBQ6h2hRacFX5dV/BCDDzt/QlWvc=; b=do3GDw0tW7wzPv08EbxOjoC6gJG0ocKIWIHgeRhmrKbclQF/Siizi+9EDl1y5sxGz+g6MT 3mtktua6ep0VrM+AaD5tgkojY6LG/5ySmf+gr1SlNciVMaEVKDbofRa63flSNzmgc1yYIr XZtWAfW+WI/uLaRnnwytkTh4IyQI7Y4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-503-9vJePj8mPr6zFEBcPwlpGw-1; Mon, 29 Jun 2020 22:24:14 -0400 X-MC-Unique: 9vJePj8mPr6zFEBcPwlpGw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E5135107ACF2; Tue, 30 Jun 2020 02:24:12 +0000 (UTC) Received: from localhost (ovpn-13-98.pek2.redhat.com [10.72.13.98]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7210F9CFF1; Tue, 30 Jun 2020 02:24:09 +0000 (UTC) From: Ming Lei To: Jens Axboe Cc: linux-block@vger.kernel.org, Ming Lei , Christoph Hellwig Subject: [PATCH 1/3] blk-mq: move blk_mq_get_driver_tag into blk-mq.c Date: Tue, 30 Jun 2020 10:23:54 +0800 Message-Id: <20200630022356.2149607-2-ming.lei@redhat.com> In-Reply-To: <20200630022356.2149607-1-ming.lei@redhat.com> References: <20200630022356.2149607-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org blk_mq_get_driver_tag() is only used by blk-mq.c and is supposed to stay in blk-mq.c, so move it and preparing for cleanup code of get/put driver tag. Meantime hctx_may_queue() is moved to header file and it is fine since it is defined as inline always. No functional change. Cc: Christoph Hellwig Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- block/blk-mq-tag.c | 58 ---------------------------------------------- block/blk-mq-tag.h | 39 ++++++++++++++++++++++++------- block/blk-mq.c | 34 +++++++++++++++++++++++++++ 3 files changed, 65 insertions(+), 66 deletions(-) diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index ae722f8b13fb..d54890b1a44e 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -56,37 +56,6 @@ void __blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) blk_mq_tag_wakeup_all(tags, false); } -/* - * For shared tag users, we track the number of currently active users - * and attempt to provide a fair share of the tag depth for each of them. - */ -static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx, - struct sbitmap_queue *bt) -{ - unsigned int depth, users; - - if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_SHARED)) - return true; - if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) - return true; - - /* - * Don't try dividing an ant - */ - if (bt->sb.depth == 1) - return true; - - users = atomic_read(&hctx->tags->active_queues); - if (!users) - return true; - - /* - * Allow at least some tags - */ - depth = max((bt->sb.depth + users - 1) / users, 4U); - return atomic_read(&hctx->nr_active) < depth; -} - static int __blk_mq_get_tag(struct blk_mq_alloc_data *data, struct sbitmap_queue *bt) { @@ -191,33 +160,6 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data) return tag + tag_offset; } -bool __blk_mq_get_driver_tag(struct request *rq) -{ - struct sbitmap_queue *bt = &rq->mq_hctx->tags->bitmap_tags; - unsigned int tag_offset = rq->mq_hctx->tags->nr_reserved_tags; - bool shared = blk_mq_tag_busy(rq->mq_hctx); - int tag; - - if (blk_mq_tag_is_reserved(rq->mq_hctx->sched_tags, rq->internal_tag)) { - bt = &rq->mq_hctx->tags->breserved_tags; - tag_offset = 0; - } - - if (!hctx_may_queue(rq->mq_hctx, bt)) - return false; - tag = __sbitmap_queue_get(bt); - if (tag == BLK_MQ_NO_TAG) - return false; - - rq->tag = tag + tag_offset; - if (shared) { - rq->rq_flags |= RQF_MQ_INFLIGHT; - atomic_inc(&rq->mq_hctx->nr_active); - } - rq->mq_hctx->tags->rqs[rq->tag] = rq; - return true; -} - void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx, unsigned int tag) { diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 2e4ef51cdb32..3945c7f5b944 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -51,14 +51,6 @@ enum { BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1, }; -bool __blk_mq_get_driver_tag(struct request *rq); -static inline bool blk_mq_get_driver_tag(struct request *rq) -{ - if (rq->tag != BLK_MQ_NO_TAG) - return true; - return __blk_mq_get_driver_tag(rq); -} - extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *); extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *); @@ -78,6 +70,37 @@ static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx) __blk_mq_tag_idle(hctx); } +/* + * For shared tag users, we track the number of currently active users + * and attempt to provide a fair share of the tag depth for each of them. + */ +static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx, + struct sbitmap_queue *bt) +{ + unsigned int depth, users; + + if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_SHARED)) + return true; + if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state)) + return true; + + /* + * Don't try dividing an ant + */ + if (bt->sb.depth == 1) + return true; + + users = atomic_read(&hctx->tags->active_queues); + if (!users) + return true; + + /* + * Allow at least some tags + */ + depth = max((bt->sb.depth + users - 1) / users, 4U); + return atomic_read(&hctx->nr_active) < depth; +} + /* * This helper should only be used for flush request to share tag * with the request cloned from, and both the two requests can't be diff --git a/block/blk-mq.c b/block/blk-mq.c index d07e55455726..0438bf388fde 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1107,6 +1107,40 @@ static inline unsigned int queued_to_index(unsigned int queued) return min(BLK_MQ_MAX_DISPATCH_ORDER - 1, ilog2(queued) + 1); } +static bool __blk_mq_get_driver_tag(struct request *rq) +{ + struct sbitmap_queue *bt = &rq->mq_hctx->tags->bitmap_tags; + unsigned int tag_offset = rq->mq_hctx->tags->nr_reserved_tags; + bool shared = blk_mq_tag_busy(rq->mq_hctx); + int tag; + + if (blk_mq_tag_is_reserved(rq->mq_hctx->sched_tags, rq->internal_tag)) { + bt = &rq->mq_hctx->tags->breserved_tags; + tag_offset = 0; + } + + if (!hctx_may_queue(rq->mq_hctx, bt)) + return false; + tag = __sbitmap_queue_get(bt); + if (tag == BLK_MQ_NO_TAG) + return false; + + rq->tag = tag + tag_offset; + if (shared) { + rq->rq_flags |= RQF_MQ_INFLIGHT; + atomic_inc(&rq->mq_hctx->nr_active); + } + rq->mq_hctx->tags->rqs[rq->tag] = rq; + return true; +} + +static bool blk_mq_get_driver_tag(struct request *rq) +{ + if (rq->tag != BLK_MQ_NO_TAG) + return true; + return __blk_mq_get_driver_tag(rq); +} + static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode, int flags, void *key) { From patchwork Tue Jun 30 02:23:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 11632981 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4AF613B4 for ; Tue, 30 Jun 2020 02:24:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCAC120774 for ; Tue, 30 Jun 2020 02:24:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="OQ0Y8rke" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728334AbgF3CY0 (ORCPT ); Mon, 29 Jun 2020 22:24:26 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:34259 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726288AbgF3CYZ (ORCPT ); Mon, 29 Jun 2020 22:24:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593483865; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=B+Dy1ZMcxmsCb2pxnoVi3wRRxemKqrRshy0emPRSqdI=; b=OQ0Y8rkeo1ecp37PkMuc8A5DE1J19eNTlS9ah6YYR3vUZZYlPq/aRn4/Q/UTjYnSWmNbEy 478rcjBS676y2TN9u5TnhwEDvZEVFIoluRnDapShyFljcau/EigXfIKPva9dJiWr18jyag lsQk+Gi6ukhf8FC2ei0zr1+5YISBqJ0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-229-dBkBOcc0P0WdB2MJXEvZ9w-1; Mon, 29 Jun 2020 22:24:17 -0400 X-MC-Unique: dBkBOcc0P0WdB2MJXEvZ9w-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 363F5804001; Tue, 30 Jun 2020 02:24:16 +0000 (UTC) Received: from localhost (ovpn-13-98.pek2.redhat.com [10.72.13.98]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7B3897166E; Tue, 30 Jun 2020 02:24:15 +0000 (UTC) From: Ming Lei To: Jens Axboe Cc: linux-block@vger.kernel.org, Ming Lei , Christoph Hellwig Subject: [PATCH 2/3] blk-mq: move blk_mq_put_driver_tag() into blk-mq.c Date: Tue, 30 Jun 2020 10:23:55 +0800 Message-Id: <20200630022356.2149607-3-ming.lei@redhat.com> In-Reply-To: <20200630022356.2149607-1-ming.lei@redhat.com> References: <20200630022356.2149607-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org It is used by blk-mq.c only, so move it to the source file. Suggested-by: Christoph Hellwig Cc: Christoph Hellwig Signed-off-by: Ming Lei Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- block/blk-mq.c | 20 ++++++++++++++++++++ block/blk-mq.h | 20 -------------------- 2 files changed, 20 insertions(+), 20 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index 0438bf388fde..cabeeeb3d56c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -670,6 +670,26 @@ static inline bool blk_mq_complete_need_ipi(struct request *rq) return cpu_online(rq->mq_ctx->cpu); } +static void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx, + struct request *rq) +{ + blk_mq_put_tag(hctx->tags, rq->mq_ctx, rq->tag); + rq->tag = BLK_MQ_NO_TAG; + + if (rq->rq_flags & RQF_MQ_INFLIGHT) { + rq->rq_flags &= ~RQF_MQ_INFLIGHT; + atomic_dec(&hctx->nr_active); + } +} + +static inline void blk_mq_put_driver_tag(struct request *rq) +{ + if (rq->tag == BLK_MQ_NO_TAG || rq->internal_tag == BLK_MQ_NO_TAG) + return; + + __blk_mq_put_driver_tag(rq->mq_hctx, rq); +} + bool blk_mq_complete_request_remote(struct request *rq) { WRITE_ONCE(rq->state, MQ_RQ_COMPLETE); diff --git a/block/blk-mq.h b/block/blk-mq.h index b3ce0f3a2ad2..a62ca18b5bde 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -196,26 +196,6 @@ static inline bool blk_mq_get_dispatch_budget(struct blk_mq_hw_ctx *hctx) return true; } -static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx, - struct request *rq) -{ - blk_mq_put_tag(hctx->tags, rq->mq_ctx, rq->tag); - rq->tag = BLK_MQ_NO_TAG; - - if (rq->rq_flags & RQF_MQ_INFLIGHT) { - rq->rq_flags &= ~RQF_MQ_INFLIGHT; - atomic_dec(&hctx->nr_active); - } -} - -static inline void blk_mq_put_driver_tag(struct request *rq) -{ - if (rq->tag == BLK_MQ_NO_TAG || rq->internal_tag == BLK_MQ_NO_TAG) - return; - - __blk_mq_put_driver_tag(rq->mq_hctx, rq); -} - static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap) { int cpu; From patchwork Tue Jun 30 02:23:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 11632985 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B2EBB6C1 for ; Tue, 30 Jun 2020 02:24:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A48C2078C for ; Tue, 30 Jun 2020 02:24:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="IEFps+FL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728355AbgF3CYb (ORCPT ); Mon, 29 Jun 2020 22:24:31 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:32792 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726288AbgF3CYa (ORCPT ); Mon, 29 Jun 2020 22:24:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1593483869; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QWP5GsWPzDGAJyiWvjF0n4+M4R9Gv8x/Kc6dcHHbADA=; b=IEFps+FLM6uP7gCGmJ+3M99U01BgKpsQEKCkpG+9jiot0LcG95h4r5bXS9KdQxBKdSFviI AuBb3tQUIaa/Jkmh1ieSwppBTQ4ub+nSG/pYmoq2HF/8ax3BakDjGMU6x2Q7homn6+vtTD QQPkYLVX1+MUZ4+u70/Cs1/DAtZI8p4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-168-5N_70le0MoSsMKKlVZrhVg-1; Mon, 29 Jun 2020 22:24:25 -0400 X-MC-Unique: 5N_70le0MoSsMKKlVZrhVg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3C63380183C; Tue, 30 Jun 2020 02:24:24 +0000 (UTC) Received: from localhost (ovpn-13-98.pek2.redhat.com [10.72.13.98]) by smtp.corp.redhat.com (Postfix) with ESMTP id 453922B472; Tue, 30 Jun 2020 02:24:17 +0000 (UTC) From: Ming Lei To: Jens Axboe Cc: linux-block@vger.kernel.org, Ming Lei , Christoph Hellwig Subject: [PATCH 3/3] blk-mq: centralise related handling into blk_mq_get_driver_tag Date: Tue, 30 Jun 2020 10:23:56 +0800 Message-Id: <20200630022356.2149607-4-ming.lei@redhat.com> In-Reply-To: <20200630022356.2149607-1-ming.lei@redhat.com> References: <20200630022356.2149607-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Move blk_mq_tag_busy(), .nr_active update and request assignment into blk_mq_get_driver_tag(), all are good to do during getting driver tag. Meantime blk-flush related code is simplified and flush request needn't to update the request table manually any more. Cc: Christoph Hellwig Signed-off-by: Ming Lei --- block/blk-flush.c | 13 ++++--------- block/blk-mq-tag.h | 12 ------------ block/blk-mq.c | 33 +++++++++++++-------------------- block/blk.h | 5 ----- 4 files changed, 17 insertions(+), 46 deletions(-) diff --git a/block/blk-flush.c b/block/blk-flush.c index 21108a550fbf..3b0c5cfe922a 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -236,12 +236,10 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error) error = fq->rq_status; hctx = flush_rq->mq_hctx; - if (!q->elevator) { - blk_mq_tag_set_rq(hctx, flush_rq->tag, fq->orig_rq); + if (!q->elevator) flush_rq->tag = -1; - } else { + else flush_rq->internal_tag = -1; - } running = &fq->flush_queue[fq->flush_running_idx]; BUG_ON(fq->flush_pending_idx == fq->flush_running_idx); @@ -315,13 +313,10 @@ static void blk_kick_flush(struct request_queue *q, struct blk_flush_queue *fq, flush_rq->mq_ctx = first_rq->mq_ctx; flush_rq->mq_hctx = first_rq->mq_hctx; - if (!q->elevator) { - fq->orig_rq = first_rq; + if (!q->elevator) flush_rq->tag = first_rq->tag; - blk_mq_tag_set_rq(flush_rq->mq_hctx, first_rq->tag, flush_rq); - } else { + else flush_rq->internal_tag = first_rq->internal_tag; - } flush_rq->cmd_flags = REQ_OP_FLUSH | REQ_PREFLUSH; flush_rq->cmd_flags |= (flags & REQ_DRV) | (flags & REQ_FAILFAST_MASK); diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h index 3945c7f5b944..b1acac518c4e 100644 --- a/block/blk-mq-tag.h +++ b/block/blk-mq-tag.h @@ -101,18 +101,6 @@ static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx, return atomic_read(&hctx->nr_active) < depth; } -/* - * This helper should only be used for flush request to share tag - * with the request cloned from, and both the two requests can't be - * in flight at the same time. The caller has to make sure the tag - * can't be freed. - */ -static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx, - unsigned int tag, struct request *rq) -{ - hctx->tags->rqs[tag] = rq; -} - static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags, unsigned int tag) { diff --git a/block/blk-mq.c b/block/blk-mq.c index cabeeeb3d56c..44b101757d33 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -277,26 +277,20 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, { struct blk_mq_tags *tags = blk_mq_tags_from_data(data); struct request *rq = tags->static_rqs[tag]; - req_flags_t rq_flags = 0; if (data->flags & BLK_MQ_REQ_INTERNAL) { rq->tag = BLK_MQ_NO_TAG; rq->internal_tag = tag; } else { - if (data->hctx->flags & BLK_MQ_F_TAG_SHARED) { - rq_flags = RQF_MQ_INFLIGHT; - atomic_inc(&data->hctx->nr_active); - } rq->tag = tag; rq->internal_tag = BLK_MQ_NO_TAG; - data->hctx->tags->rqs[rq->tag] = rq; } /* csd/requeue_work/fifo_time is initialized before use */ rq->q = data->q; rq->mq_ctx = data->ctx; rq->mq_hctx = data->hctx; - rq->rq_flags = rq_flags; + rq->rq_flags = 0; rq->cmd_flags = data->cmd_flags; if (data->flags & BLK_MQ_REQ_PREEMPT) rq->rq_flags |= RQF_PREEMPT; @@ -380,8 +374,6 @@ static struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data) retry: data->ctx = blk_mq_get_ctx(q); data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx); - if (!(data->flags & BLK_MQ_REQ_INTERNAL)) - blk_mq_tag_busy(data->hctx); /* * Waiting allocations only fail because of an inactive hctx. In that @@ -478,8 +470,6 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q, if (q->elevator) data.flags |= BLK_MQ_REQ_INTERNAL; - else - blk_mq_tag_busy(data.hctx); ret = -EWOULDBLOCK; tag = blk_mq_get_tag(&data); @@ -1131,7 +1121,6 @@ static bool __blk_mq_get_driver_tag(struct request *rq) { struct sbitmap_queue *bt = &rq->mq_hctx->tags->bitmap_tags; unsigned int tag_offset = rq->mq_hctx->tags->nr_reserved_tags; - bool shared = blk_mq_tag_busy(rq->mq_hctx); int tag; if (blk_mq_tag_is_reserved(rq->mq_hctx->sched_tags, rq->internal_tag)) { @@ -1146,19 +1135,23 @@ static bool __blk_mq_get_driver_tag(struct request *rq) return false; rq->tag = tag + tag_offset; - if (shared) { - rq->rq_flags |= RQF_MQ_INFLIGHT; - atomic_inc(&rq->mq_hctx->nr_active); - } - rq->mq_hctx->tags->rqs[rq->tag] = rq; return true; } static bool blk_mq_get_driver_tag(struct request *rq) { - if (rq->tag != BLK_MQ_NO_TAG) - return true; - return __blk_mq_get_driver_tag(rq); + struct blk_mq_hw_ctx *hctx = rq->mq_hctx; + bool shared = blk_mq_tag_busy(rq->mq_hctx); + + if (rq->tag == BLK_MQ_NO_TAG && !__blk_mq_get_driver_tag(rq)) + return false; + + if (shared) { + rq->rq_flags |= RQF_MQ_INFLIGHT; + atomic_inc(&hctx->nr_active); + } + hctx->tags->rqs[rq->tag] = rq; + return true; } static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode, diff --git a/block/blk.h b/block/blk.h index 3a120a070dac..459790f9783d 100644 --- a/block/blk.h +++ b/block/blk.h @@ -25,11 +25,6 @@ struct blk_flush_queue { struct list_head flush_data_in_flight; struct request *flush_rq; - /* - * flush_rq shares tag with this rq, both can't be active - * at the same time - */ - struct request *orig_rq; struct lock_class_key key; spinlock_t mq_flush_lock; };