From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S932410AbcFIQGK (ORCPT <rfc822;w@1wt.eu>);
	Thu, 9 Jun 2016 12:06:10 -0400
Received: from mail-io0-f179.google.com ([209.85.223.179]:36287 "EHLO
	mail-io0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S932075AbcFIQGH (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Thu, 9 Jun 2016 12:06:07 -0400
Subject: Re: [PATCH v6 0/8] block: prepare for multipage bvecs
To: Ming Lei <ming.lei@canonical.com>, Jens Axboe <axboe@fb.com>,
        linux-kernel@vger.kernel.org
References: <1464615294-9946-1-git-send-email-ming.lei@canonical.com>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@infradead.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        "open list:DRBD DRIVER" <drbd-dev@lists.linbit.com>,
        Jan Kara <jack@suse.cz>, Joe Thornber <ejt@redhat.com>,
        Keith Busch <keith.busch@intel.com>,
        Kent Overstreet <kent.overstreet@gmail.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Michal Hocko <mhocko@suse.com>, Mike Snitzer <snitzer@redhat.com>,
        NeilBrown <neilb@suse.com>, Sagi Grimberg <sagig@mellanox.com>,
        Shaohua Li <shli@fb.com>, Steven Whitehouse <swhiteho@redhat.com>,
        Tejun Heo <tj@kernel.org>,
        "open list:XFS FILESYSTEM" <xfs@oss.sgi.com>
From: Jens Axboe <axboe@kernel.dk>
Message-ID: <575993EA.3010005@kernel.dk>
Date: Thu, 9 Jun 2016 10:06:02 -0600
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101
 Thunderbird/38.8.0
MIME-Version: 1.0
In-Reply-To: <1464615294-9946-1-git-send-email-ming.lei@canonical.com>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 05/30/2016 07:34 AM, Ming Lei wrote:
> Hi,
>
> Interests[1] have been shown in multipage bvecs, so this patchset
> try to prepare for the support and do two things:
>
> 1) the 1st 4 patches use bvec iterator to implement iterate_bvec(),
> then we can drop the non-standard way for iterating bvec, which
> can be thought as a good cleanup for lib/iov_iter.c
>
> 2) remove BIO_MAX_SECTORS and makre BIO_MAX_SIZE as obsolete, and
> now there is only one user for each. Once multipage bvecs is introduced,
> one bio may hold lots of sectors, and we should always use sort of
> BIO_MAX_VECS which should be introduced in future and is similiar
> with current BIO_MAX_PAGES.
>
> The only functional change is iterate_bvec():lib/iov_iter.c
>
> xfstests(-a auto) over loop aio is run for ext4/xfs to verify
> the change and no regression found with this patchset.

Added patches 1-7, still waiting for an answer on my reply to #8.

-- 
Jens Axboe