linux-kernel - Re: [PATCH 1/1] um: ubd: Fix data corruption

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Message-ID: <4CB745FC.5090504@gmail.com>
Date:	Thu, 14 Oct 2010 20:03:40 +0200
From:	Tejun Heo <htejun@...il.com>
To:	richard -rw- weinberger <richard.weinberger@...il.com>
CC:	Chris Frey <cdfrey@...rsquare.net>,
	Jens Axboe <jaxboe@...ionio.com>,
	Richard Weinberger <richard@....at>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"jdike@...toit.com" <jdike@...toit.com>,
	"user-mode-linux-devel@...ts.sourceforge.net" 
	<user-mode-linux-devel@...ts.sourceforge.net>,
	"user-mode-linux-user@...ts.sourceforge.net" 
	<user-mode-linux-user@...ts.sourceforge.net>,
	"janjaap@....nl" <janjaap@....nl>,
	"geert@...ux-m68k.org" <geert@...ux-m68k.org>,
	"martin.petersen@...cle.com" <martin.petersen@...cle.com>,
	"adobriyan@...il.com" <adobriyan@...il.com>,
	"syzop@...nscan.org" <syzop@...nscan.org>
Subject: Re: [PATCH 1/1] um: ubd: Fix data corruption

Hello,

On 10/14/2010 04:20 PM, richard -rw- weinberger wrote:
> It does not work for me.
> But the error is a different one. :-)
> Without your patch I've never got this kernel trace.
> 
> [   59.850000] kworker/0:1: page allocation failure. order:0, mode:0x20

Hmm... you're seeing out of memory condition.  If the code screws up
filesystem access, I suppose it could make that happen too but can you
please check the configuration just in case (especially the memory
size)?  Also, if you can reliably reproduce the filesystem corruption
w/o the patch, can you please tell me how to do it?

Thanks.

-- 
tejun
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