[Qemu-devel] Re: [patch 0/3] block migration fixes

[Yoshiaki Tamura <tamura.yoshiaki@lab.ntt.co.jp>]

Marcelo Tosatti wrote:
> On Tue, Nov 09, 2010 at 03:02:12PM +0900, Yoshiaki Tamura wrote:
>> Marcelo Tosatti wrote:
>>> Following patchset fixes block migration corruption issues.
>>
>> Hi Marcelo,
>>
>> Thanks for looking into this issue.  Although we tried your patches, we're still
>> seeing the corruption.  If we execute block migration while copying a file
>> locally, md5sum of the copied file doesn't match with the original.  Sometimes,
>> the filesystem returns an I/O error.
>>
>> Could you let us know how you tested and debugged?  Did you use blkverify?
>
> Yoshiaki,
>
> I first reproduced corruption by copying a large file during "migrate
> -i", with shared base on qcow2 filesystem, as in your original report.
>
> To debug the problem, file with different byte pattern at every 1MB
> (size of dirty chunk) was created and copied directly to an IDE disk in
> the guest. Raw format used for the disk image.
>
> With this patchset, i'm not able to reproduce the original issue
> anymore.
>
> Can you please provide more details on how to reproduce?

Marcelo,

We double checked and the patchset does seem to fix the problem.  The was a 
mistake in our test procedure.  Sorry for the confusion.

Thanks,

Yoshi