linux-kernel - Re: [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio

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Message-ID: <CA+icZUXarbLJt5yL_JJHntDFRkBZyvNMHxUGcOLNjULUQ8FhHw@mail.gmail.com>
Date:	Wed, 31 Dec 2014 23:35:10 +0100
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Dave Kleikamp <dave.kleikamp@...cle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Maxim V. Patlasov" <mpatlasov@...allels.com>,
	Zach Brown <zab@...bo.net>, Ming Lei <ming.lei@...onical.com>
Subject: Re: [PATCH V8 00/33] loop: Issue O_DIRECT aio using bio_vec

On Wed, Dec 31, 2014 at 10:52 PM, Dave Kleikamp
<dave.kleikamp@...cle.com> wrote:
> On 12/31/2014 02:38 PM, Sedat Dilek wrote:
>>
>> What has happened to that aio_loop patchset?
>> Is it in Linux-next?
>> ( /me started to play with "block: loop: convert to blk-mq (v3)", so I
>> recalled this other improvement. )
>
> It met with some harsh resistance, so I backed off on it. Then Al Viro
> got busy re-writing the iov_iter infrastructure and I put my patchset on
> the shelf to look at later. Then Ming Lei submitted more up-to-date
> patchset: https://lkml.org/lkml/2014/8/6/175
>
> It looks like Ming is currently only pushing the first half of that
> patchset. I don't know what his plans are for the last three patches:
>
> aio: add aio_kernel_() interface
> fd/direct-io: introduce should_dirty for kernel aio
> block: loop: support to submit I/O via kernel aio based
>

I tested with block-mq-v3 (for next-20141231) [1] and this looks promising [2].

Maybe Ming can say what the plan is with the missing parts.

- Sedat -

[1] http://marc.info/?l=linux-kernel&m=142003226701471&w=2
[2]http://marc.info/?l=linux-kernel&m=142006516408381&w=2
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