Re: [vserver] Possible Hashify Corruption - Update 2

From: Herbert Poetzl <>
Date: Thu 21 Oct 2010 - 10:16:46 BST
Message-ID: <>

On Wed, Oct 20, 2010 at 03:02:25PM +0100, Gordan Bobic wrote:
> I have just tested this with a new kernel. And the issue doesn't arise
> with! So it is definitely a kernel bug, most
> likely in ext4.

> This really needs to be documented and stressed on the pages with
> download links. Hashify feature causes total data corruption with
> when used on ext4 without a journal.

well, thanks for investigating this, but you are
aware that _nobody_ is supposed to use that kernel
or patch anymore, as it was highly experimental
(see the pre) and superceeded by a working version

in general, I'd stay away from kernels 2.6.25-2.6.31
especially with 'sensitive' filesystems like ext4,
reiserfs and btrfs ...

> I haven't tried other cases (ext4 with a journal or other file systems)
> so I cannot speak for those, but in the mentioned use cases it is
> completely repeatable.

if the issue persists in the recent kernel branches,
i.e. in or even 2.6.33.x/2.6.35.x then
we need to investigate, otherwise I consider this
closed ...


> Gordan
Received on Thu Oct 21 10:16:59 2010

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