linux-ext4 - Re: [PATCH 1/1] ext4, dio: Remove overflow for size >2G in aio-dio code.

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Date:	Mon, 21 May 2012 19:31:33 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	manish honap <manish_honap_vit@...oo.co.in>,
	"adilger.kernel@...ger.ca" <adilger.kernel@...ger.ca>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/1] ext4, dio: Remove overflow for size >2G in aio-dio
 code.

On Mon, May 21, 2012 at 03:22:28PM -0700, Linus Torvalds wrote:
> 
> So I'm pretty sure this patch is what we want, and rw_verify_area()
> really is required to protect low-level filesystems from these kinds
> of issues. Not just ext4.
> 
> At the same time, I would *really* want somebody who actually uses
> anything AIO to test it out too. Because I want to not only commit it,
> but also mark it for stable - and it would be nice to have some more
> testing than me saying "ok, it passes the one test-case sent to me"
> and "hey, the code looks sane".

Hi Linus,

We do use AIO at Google, and I primarily use fio (usually as part of
xfstests) to test AIO functionality.

If you like I can carry the patch in the ext4 tree and test it as part
of the ext4 commits for the merge window.

I probably won't be able to get to it until a bit later in the week,
though.  Things have been really crazy for me this past two months...

						- Ted
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