Re: raw disks no longer work in latest kvm (kvm-88 was fine)

[Antoine Martin <antoine@nagafix.co.uk>]

On 05/22/2010 06:17 PM, Michael Tokarev wrote:
> 22.05.2010 14:44, Antoine Martin wrote:
>> Bump.
>>
>> Now that qemu is less likely to eat my data, " *[Qemu-devel] [PATCH 4/8]
>> block: fix sector comparism in*"
>> http://marc.info/?l=qemu-devel&m=127436114712437
>>
>> I thought I would try using the raw 1.5TB partition again with KVM,
>> still no go.
>
> Hm.  I don't have so much diskspace (my largest is 750Gb, whole disk),
> but I created 1.5Tb sparse lvm volume.  It appears to work for me,
> even 32bit version of qemu-kvm-0.12.4 (with the mentioned patch applied).
>
>> I am still having to use:
>>
>> #undef CONFIG_PREADV
>>
>> Host and guest kernel version is 2.6.34, headers 2.6.33, glibc 2.10.1-r1
>> qemu-kvm 0.12.4 + patch above.
>
> eglibc-2.10.2-6, kernel #2.6.34.0-amd64,
> kernel headers 2.6.32-11~bpo50+1
> (debian)
>
>> Who do I need to bug? glibc? kvm?
>
> are you running 32bit userspace and 64bit kernel
> by a chance?  If yes that's a kernel prob, see
> http://thread.gmane.org/gmane.linux.kernel.aio.general/2891
> (the fix will be in 2.6.35 hopefully, now it's in
> Andrew Morton's tree).
>
> If not, well, I don't know ;)
I'm not: 64-bit host and 64-bit guest.

Thanks anyway.
Antoine
>
> /mjt
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