Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755546AbcL0QBK (ORCPT ); Tue, 27 Dec 2016 11:01:10 -0500 Received: from mail-pf0-f196.google.com ([209.85.192.196]:32970 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752546AbcL0P7v (ORCPT ); Tue, 27 Dec 2016 10:59:51 -0500 From: Ming Lei To: Jens Axboe , linux-kernel@vger.kernel.org Cc: linux-block@vger.kernel.org, Christoph Hellwig , Ming Lei , Shaohua Li , linux-raid@vger.kernel.org (open list:SOFTWARE RAID (Multiple Disks) SUPPORT) Subject: [PATCH v1 11/54] md: set NO_MP for request queue of md Date: Tue, 27 Dec 2016 23:56:00 +0800 Message-Id: <1482854250-13481-12-git-send-email-tom.leiming@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1482854250-13481-1-git-send-email-tom.leiming@gmail.com> References: <1482854250-13481-1-git-send-email-tom.leiming@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 992 Lines: 40 MD isn't ready for multipage bvecs, so mark it as NO_MP. Signed-off-by: Ming Lei --- drivers/md/md.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/md/md.c b/drivers/md/md.c index 82821ee0d57f..63c6326bafde 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5162,6 +5162,16 @@ static void md_safemode_timeout(unsigned long data) static int start_dirty_degraded; +/* + * MD isn't ready for multipage bvecs yet, and set the flag + * so that MD still can see singlepage bvecs bio + */ +static inline void md_set_no_mp(struct mddev *mddev) +{ + if (mddev->queue) + set_bit(QUEUE_FLAG_NO_MP, &mddev->queue->queue_flags); +} + int md_run(struct mddev *mddev) { int err; @@ -5381,6 +5391,8 @@ int md_run(struct mddev *mddev) if (mddev->sb_flags) md_update_sb(mddev, 0); + md_set_no_mp(mddev); + md_new_event(mddev); sysfs_notify_dirent_safe(mddev->sysfs_state); sysfs_notify_dirent_safe(mddev->sysfs_action); -- 2.7.4