linux-kernel - Re: Boot failure on Arndale with next-20131105

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Message-ID: <CAOesGMiyp3VNUZf=A_MMVAKsdqtE8nJqNuNCmZh6PO2zkU-oTA@mail.gmail.com>
Date:	Tue, 5 Nov 2013 14:41:42 -0800
From:	Olof Johansson <olof@...om.net>
To:	Stephen Warren <swarren@...dotorg.org>
Cc:	Chris Mason <chris.mason@...ionio.com>,
	Jens Axboe <axboe@...nel.dk>,
	Tushar Behera <tushar.behera@...aro.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Kent Overstreet <kmo@...erainc.com>
Subject: Re: Boot failure on Arndale with next-20131105

On Tue, Nov 5, 2013 at 2:06 PM, Stephen Warren <swarren@...dotorg.org> wrote:
> On 11/05/2013 01:56 PM, Chris Mason wrote:
>> Quoting Olof Johansson (2013-11-05 15:38:33)
>>> On Tue, Nov 5, 2013 at 12:33 PM, Chris Mason <chris.mason@...ionio.com> wrote:
>>>> Quoting Olof Johansson (2013-11-05 15:23:51)
>>>>> On Tue, Nov 5, 2013 at 11:33 AM, Jens Axboe <axboe@...nel.dk> wrote:
>>>>
>>>> [ horrible crashes fixed by removing my patch ]
>>>>
> ...
>> Ok, I think I see it.  My guess is that you're hitting bounce buffers.
>> __blk_queue_bounce is the only caller of the bio splitting code I can
>> see that you might be hitting.
>>
>> My first patch exposed a lurking bug in bio_clone_biovec.  Basically
>> bio->bi_vcnt is being doubled instead of initialized.
>>
>> This patch is only compile tested, but I think it'll fix it.
>
> Tested-by: Stephen Warren <swarren@...dia.com>
> (this fixes the issue on Tegra30/Beaver at least)

Tested-by: Olof Johansson <olof@...om.net>

This resolves boot failures on:
* Tegra30/beaver
* OMAP4/panda
* i.MX6/wandboard

Thanks Chris!

-Olof
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