From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6BBACC43441 for ; Tue, 13 Nov 2018 15:16:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3DF242251B for ; Tue, 13 Nov 2018 15:16:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3DF242251B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-block-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388178AbeKNBPN (ORCPT ); Tue, 13 Nov 2018 20:15:13 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48234 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730939AbeKNBPM (ORCPT ); Tue, 13 Nov 2018 20:15:12 -0500 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 mx1.redhat.com (Postfix) with ESMTPS id EBE232D7E2; Tue, 13 Nov 2018 15:16:38 +0000 (UTC) Received: from localhost (ovpn-8-23.pek2.redhat.com [10.72.8.23]) by smtp.corp.redhat.com (Postfix) with ESMTP id C204760150; Tue, 13 Nov 2018 15:16:34 +0000 (UTC) From: Ming Lei To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Ming Lei , Christoph Hellwig Subject: [PATCH V9 14/19] block: enable multipage bvecs Date: Tue, 13 Nov 2018 23:15:00 +0800 Message-Id: <20181113151505.15498-15-ming.lei@redhat.com> In-Reply-To: <20181113151505.15498-1-ming.lei@redhat.com> References: <20181113151505.15498-1-ming.lei@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 13 Nov 2018 15:16:39 +0000 (UTC) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org This patch pulls the trigger for multi-page bvecs. Now any request queue which supports queue cluster will see multi-page bvecs. Cc: Christoph Hellwig Signed-off-by: Ming Lei --- block/bio.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/block/bio.c b/block/bio.c index 6486722d4d4b..ed6df6f8e63d 100644 --- a/block/bio.c +++ b/block/bio.c @@ -767,12 +767,24 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page, if (bio->bi_vcnt > 0) { struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1]; - - if (page == bv->bv_page && off == bv->bv_offset + bv->bv_len) { - bv->bv_len += len; - bio->bi_iter.bi_size += len; - return true; - } + struct request_queue *q = NULL; + + if (page == bv->bv_page && off == (bv->bv_offset + bv->bv_len) + && (off + len) <= PAGE_SIZE) + goto merge; + + if (bio->bi_disk) + q = bio->bi_disk->queue; + + /* disable multi-page bvec too if cluster isn't enabled */ + if (!q || !blk_queue_cluster(q) || + ((page_to_phys(bv->bv_page) + bv->bv_offset + bv->bv_len) != + (page_to_phys(page) + off))) + return false; + merge: + bv->bv_len += len; + bio->bi_iter.bi_size += len; + return true; } return false; } -- 2.9.5