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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Anthony Wright <anthony@overnetdata.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: USB disk corruption on Xen 4.1.0 & Linux 2.6.38.7
Date: Tue, 31 May 2011 10:54:09 -0400	[thread overview]
Message-ID: <20110531145409.GN14641@dumpdata.com> (raw)
In-Reply-To: <9158059.26.1306843669556.JavaMail.root@zimbra.overnetdata.com>

On Tue, May 31, 2011 at 01:07:49PM +0100, Anthony Wright wrote:
> I build Xen 4.1.0 and linux 2.6.38.7 from source to do a DIY system based on Linux From Scratch (LFS).

Ok.. Had you tried my #devel/next-2.6.38 branch in the past?

> 
> When I try to read from a USB memory stick (around 64M big), I get corruption on the latest version of Xen.

So this is from dom0 kernel, right?

> 
> With Xen 3.x and linux 2.6.18 I can read the memory stick no problems.
> 
> If I use the linux 2.6.38.7 kernel without a Xen hypervisor I can read the memory stick without problems.
> 
> If I use the same setup, but this time introduce the Xen 4.1.0 hypervisor I get random blocks of sectors on the USB disk returning all zeros. Normally these blocks change each time I reboot, but are fixed once they've been established. On one occasion the blocks changed continuously each time I looked at the disk (I have a big file on the USB disk and I run md5sum before accessing it).

What is the filesystem on the USB disk?
> 
> Just to remove other possibilities I've checked the system's RAM and it's fine (I've seen similar problems before with dodgy RAM). If I try to access a hard disk or CDROM, everything is fine.
> 
> This could be a problem with the way I've built the kernel or Xen, but it seems to suggest that there's a bug in Xen.
> 
> I'm happy to try to isolate the problem further if it can't be reproduced elsewhere. My first suggestion would be to use a known good binary copy of xen 4.1.0 and/or linux 2.6.38.7 if anybody can supply one.

<sigh>Please provide serial log or dmesg output.
> 
> thanks,
> 
> Anthony Wright
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

  reply	other threads:[~2011-05-31 14:54 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <8150663.20.1306842333642.JavaMail.root@zimbra.overnetdata.com>
2011-05-31 12:07 ` USB disk corruption on Xen 4.1.0 & Linux 2.6.38.7 Anthony Wright
2011-05-31 14:54   ` Konrad Rzeszutek Wilk [this message]
2011-06-01  9:52     ` Anthony Wright
2011-06-01 14:23       ` Konrad Rzeszutek Wilk
2011-06-02 12:24         ` Anthony Wright
2011-06-02 14:38           ` Konrad Rzeszutek Wilk
2011-06-02 14:44             ` Konrad Rzeszutek Wilk
2011-06-02 15:59               ` Anthony Wright
2011-06-09 13:11               ` Anthony Wright
2011-06-09 13:25                 ` Ian Pratt
2011-06-09 13:32                 ` Konrad Rzeszutek Wilk
2011-06-09 13:40                   ` Anthony Wright
2011-06-10 16:46                   ` Konrad Rzeszutek Wilk
2011-06-13 22:06                     ` Konrad Rzeszutek Wilk
2011-06-15 10:45                       ` Anthony Wright
2011-06-15 11:43                         ` Ian Pratt
2011-06-16 20:10                         ` Konrad Rzeszutek Wilk
2011-06-17  9:45                           ` Anthony Wright
2011-06-20 12:39                             ` Konrad Rzeszutek Wilk
2011-07-29 19:24                               ` Anthony Wright
2011-06-01  8:53   ` Ian Pratt

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