Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752917AbdFZMWY (ORCPT ); Mon, 26 Jun 2017 08:22:24 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43440 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752094AbdFZMWB (ORCPT ); Mon, 26 Jun 2017 08:22:01 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com EE3B291C36 Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx02.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=ming.lei@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com EE3B291C36 From: Ming Lei To: Jens Axboe , Christoph Hellwig , Huang Ying , Andrew Morton , Alexander Viro Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ming Lei Subject: [PATCH v2 50/51] block: enable multipage bvecs Date: Mon, 26 Jun 2017 20:10:33 +0800 Message-Id: <20170626121034.3051-51-ming.lei@redhat.com> In-Reply-To: <20170626121034.3051-1-ming.lei@redhat.com> References: <20170626121034.3051-1-ming.lei@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Mon, 26 Jun 2017 12:22:01 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1092 Lines: 43 This patch pulls the trigger for multipage bvecs. Now any request queue which supports queue cluster will see multipage bvecs. Signed-off-by: Ming Lei --- block/bio.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/block/bio.c b/block/bio.c index c460888f14b5..436305cde045 100644 --- a/block/bio.c +++ b/block/bio.c @@ -839,6 +839,11 @@ int bio_add_page(struct bio *bio, struct page *page, * a consecutive offset. Optimize this special case. */ if (bio->bi_vcnt > 0) { + struct request_queue *q = NULL; + + if (bio->bi_bdev) + q = bdev_get_queue(bio->bi_bdev); + bv = &bio->bi_io_vec[bio->bi_vcnt - 1]; if (page == bv->bv_page && @@ -846,6 +851,14 @@ int bio_add_page(struct bio *bio, struct page *page, bv->bv_len += len; goto done; } + + /* disable multipage bvec too if cluster isn't enabled */ + if (q && blk_queue_cluster(q) && + (bvec_to_phys(bv) + bv->bv_len == + page_to_phys(page) + offset)) { + bv->bv_len += len; + goto done; + } } if (bio->bi_vcnt >= bio->bi_max_vecs) -- 2.9.4