linux-kernel - Re: [PATCH v1 00/54] block: support multipage bvec

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Message-ID: <CACVXFVPrYCLOYy_XirwG5_E8BqxNB7UyqBZKWT+EoWyxK3KFZA@mail.gmail.com>
Date:   Tue, 17 Jan 2017 16:13:39 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Jens Axboe <axboe@...com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-block <linux-block@...r.kernel.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kent Overstreet <kent.overstreet@...il.com>
Subject: Re: [PATCH v1 00/54] block: support multipage bvec

On Tue, Jan 17, 2017 at 3:50 PM, Christoph Hellwig <hch@...radead.org> wrote:
> On Tue, Jan 17, 2017 at 10:40:36AM +0800, Ming Lei wrote:
>> IMO, the only one left is raid(1/5/10) which can be dealt with by the
>> "NO_MP" flag.
>
> No, they can't in the long run.  They need to handle the bvecs just
> like everyone else.

OK, looks raid(1/5/10) becomes blocker for multipage bvec now.
I will study it a bit, and maybe need help from raid guys.


Thanks,
Ming Lei