From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Artem S. Tashkinov" <t.artem@lycos.com>
Subject: Re: IO errors after "block: remove =?UTF-8?Q?bio=5Fget=5Fnr=5Fvec?=
 =?UTF-8?Q?s=28=29=22?=
Date: Tue, 22 Dec 2015 09:06:07 +0500
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To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ming Lei <tom.leiming@gmail.com>, Kent Overstreet <kent.overstreet@gmail.com>, Christoph Hellwig <hch@lst.de>, Ming Lin <ming.l@ssi.samsung.com>, Jens Axboe <axboe@fb.com>, "Artem S. Tashkinov" <t.artem@mailcity.com>, Steven Whitehouse <swhiteho@redhat.com>, Tejun Heo <tj@kernel.org>, IDE-ML <linux-ide@vger.kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, linus971@gmail.com

On 2015-12-21 10:23, Linus Torvalds wrote:
> On Sun, Dec 20, 2015 at 8:47 PM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
>> 
>> That said, we obviously need to figure out this current problem
>> regardless first..
> 
> ... although maybe it *would* be interesting to hear what happens if
> you just compile a 64-bit kernel instead?

Under x86-64 I cannot reproduce this problem. It seems like it's PAE 
specific (Kent Overstreet says he has reproduced it).

> 
> Do you still see the problem? Because if not, then we should look very
> specifically for some 32-bit PAE issue.
> 
> For example, maybe we use "unsigned long" somewhere where we should
> use "phys_addr_t". On x86-64, they obviously end up being the same. On
> normal non-PAE x86-32, they are also the same. But ..
> 
>                  Linus