From patchwork Thu Mar 30 11:36:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13194026 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 83AFDC77B71 for ; Thu, 30 Mar 2023 11:39:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231719AbjC3Ljc (ORCPT ); Thu, 30 Mar 2023 07:39:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48296 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231733AbjC3LjH (ORCPT ); Thu, 30 Mar 2023 07:39:07 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56FE1A244 for ; Thu, 30 Mar 2023 04:37:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680176243; 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=s89n5MVHIm/yrA8YFK9Xcfzas4VQ/6rU7DsLdSVa7Sk=; b=Ry/csCRQgFlR8d2yw/fPeTOJxckRAG8UjyVr2ooxGGS6ZPIP9Vn0GDeG6AXF7evDm7Xzjq Cl6jeX/fPwVgKrRMY7JX3aV8M+NxhjM8+qNhGfIHM1HkFuyPyV1f+eIBGX0W+dbvUbZPzN cwMDiScNVd/mD5bgxZ/RuRStrxqLgAE= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-604-YrZfWq1oOt6aE3h8QRqdYA-1; Thu, 30 Mar 2023 07:37:18 -0400 X-MC-Unique: YrZfWq1oOt6aE3h8QRqdYA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id D51DF3815EF4; Thu, 30 Mar 2023 11:37:17 +0000 (UTC) Received: from localhost (ovpn-8-19.pek2.redhat.com [10.72.8.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id F3EED14171BB; Thu, 30 Mar 2023 11:37:16 +0000 (UTC) From: Ming Lei To: Jens Axboe , io-uring@vger.kernel.org, linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Miklos Szeredi , ZiyangZhang , Xiaoguang Wang , Bernd Schubert , Pavel Begunkov , Stefan Hajnoczi , Dan Williams , Ming Lei Subject: [PATCH V6 08/17] block: ublk_drv: don't consider flush request in map/unmap io Date: Thu, 30 Mar 2023 19:36:21 +0800 Message-Id: <20230330113630.1388860-9-ming.lei@redhat.com> In-Reply-To: <20230330113630.1388860-1-ming.lei@redhat.com> References: <20230330113630.1388860-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org There isn't data in request of REQ_OP_FLUSH always, so don't consider it in both ublk_map_io() and ublk_unmap_io(). Reviewed-by: Ziyang Zhang Signed-off-by: Ming Lei --- drivers/block/ublk_drv.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index bc46616710d4..c73b2dba25ce 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -529,15 +529,13 @@ static int ublk_map_io(const struct ublk_queue *ubq, const struct request *req, struct ublk_io *io) { const unsigned int rq_bytes = blk_rq_bytes(req); + /* * no zero copy, we delay copy WRITE request data into ublksrv * context and the big benefit is that pinning pages in current * context is pretty fast, see ublk_pin_user_pages */ - if (req_op(req) != REQ_OP_WRITE && req_op(req) != REQ_OP_FLUSH) - return rq_bytes; - - if (ublk_rq_has_data(req)) { + if (ublk_rq_has_data(req) && req_op(req) == REQ_OP_WRITE) { struct ublk_map_data data = { .ubq = ubq, .rq = req, @@ -774,9 +772,7 @@ static inline void __ublk_rq_task_work(struct request *req, return; } - if (ublk_need_get_data(ubq) && - (req_op(req) == REQ_OP_WRITE || - req_op(req) == REQ_OP_FLUSH)) { + if (ublk_need_get_data(ubq) && (req_op(req) == REQ_OP_WRITE)) { /* * We have not handled UBLK_IO_NEED_GET_DATA command yet, * so immepdately pass UBLK_IO_RES_NEED_GET_DATA to ublksrv