linux-kernel - Re: Fw: Problems with bdev_write

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Message-ID: <557EDEE5.60600@cox.net>
Date:	Mon, 15 Jun 2015 07:19:17 -0700
From:	Charles Bertsch <cbertsch@....net>
To:	Matthew Wilcox <willy@...ux.intel.com>
CC:	Neil Brown <neilb@...e.de>, linux-fsdevel@...r.kernel.org,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
	"BertschC@....org" <BertschC@....org>
Subject: Re: Fw: Problems with bdev_write_page().

On 06/12/2015 07:48 AM, Matthew Wilcox wrote:
...
>>
>> Can you propose a fix for Charles, who can trigger this bug and nicely
>> bisected it for us - thanks Charles!!!
>
....
>
> (this patch probably doesn't apply to the current tree; it's done against
> a bit of a mishmash tree in my current working directory.  it's not for
> applynig, but for commentary).
>
Matthhew,

I tested again with v4.1-rc7, bug still present.

I was able to apply the patch (at offsets -10, -1, -8 for 
fs/block_dev.c, fs/mpage.c, and mm/page_io.c).  That test has been 
running without error for 14 hours.  The bug would occur with this setup 
within 10 minutes.

Thanks.

Charles Bertsch

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