Re: [BUG] raid1 behind writes alter bio structure illegally

[Milan Broz]

Hi Paul,

Paul Clements wrote:
> I've run into this bug on a 2.6.18 kernel, but I think the fix is still 
> applicable to the latest kernels (even though the symptoms would be 
> slightly different).
> 
> Perhaps someone who knows the block and/or SCSI layers well can comment 
> on the legality of attaching new pages to a bio without fixing up the 
> internal bio counters (details below)?

> LVM over raid1 over SCSI/nbd

Please can you try that backporting of this patch helps?

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=5d84070ee0a433620c57e85dac7f82faaec5fbb3

(If so, see https://bugzilla.redhat.com/show_bug.cgi?id=512387)

Milan
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