Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S942979AbcJ2I30 (ORCPT ); Sat, 29 Oct 2016 04:29:26 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:34606 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756966AbcJ2INx (ORCPT ); Sat, 29 Oct 2016 04:13:53 -0400 From: Ming Lei To: Jens Axboe , linux-kernel@vger.kernel.org Cc: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig , "Kirill A . Shutemov" , Ming Lei , Chris Mason , Josef Bacik , David Sterba , linux-btrfs@vger.kernel.org (open list:BTRFS FILE SYSTEM) Subject: [PATCH 26/60] btrfs: set NO_MP for request queues behind BTRFS Date: Sat, 29 Oct 2016 16:08:25 +0800 Message-Id: <1477728600-12938-27-git-send-email-tom.leiming@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477728600-12938-1-git-send-email-tom.leiming@gmail.com> References: <1477728600-12938-1-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: 763 Lines: 25 There are lots of direct access to .bi_vcnt & .bi_io_vec of bio, and it isn't ready to support multipage bvecs for BTRFS, so set NO_MP for these request queues. Signed-off-by: Ming Lei --- fs/btrfs/volumes.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 71a60cc01451..2e7237a3b84d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1011,6 +1011,9 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices, if (blk_queue_discard(q)) device->can_discard = 1; + /* BTRFS isn't ready to support multipage bvecs */ + set_bit(QUEUE_FLAG_NO_MP, &q->queue_flags); + device->bdev = bdev; device->in_fs_metadata = 0; device->mode = flags; -- 2.7.4