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Re: [Qemu-block] [Qemu-devel] Migration sometimes fails with IDE and Qem


From: Peter Lieven
Subject: Re: [Qemu-block] [Qemu-devel] Migration sometimes fails with IDE and Qemu 2.2.1
Date: Sat, 11 Apr 2015 15:11:04 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

Am 09.04.2015 um 17:17 schrieb Paolo Bonzini:
>
> On 09/04/2015 16:54, Peter Lieven wrote:
>> #define BM_MIGRATION_COMPAT_STATUS_BITS \
>>         (IDE_RETRY_DMA | IDE_RETRY_PIO | \
>>         IDE_RETRY_READ | IDE_RETRY_FLUSH)
>>
>> Why is there no IDE_RETRY_WRITE ?
> Because that's represented by none of read and flush being set. :)
>
>> Honestly, I have not yet understood that that
>> BM_MIGRATION_COMPAT_STATUS_BITS is for.
> It's just for migrations while the VM is stopped due to I/O errors
> (rerror=stop/werror=stop).

My migration problem seems to be a regression or incompatiblity in kvm-kmod. I 
started debugging
with an old kvm module accidently. It seems to work with the old module shipped
with the kernel (3.13) and fails with (3.19).

Any ideas, Paolo?

Peter



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