Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change

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On 04/04/11 07:38, Anthony Liguori wrote:
> On 04/04/2011 08:22 AM, Avi Kivity wrote:
>> On 04/03/2011 02:57 PM, Stefan Hajnoczi wrote:
>>> In order for media change to work with Linux host CD-ROM it is
>>> necessary to reopen the file (otherwise the inode size will not
>>> refresh, this is an issue with existing kernels).
>>>
>>
>> Maybe we should fix the bug in Linux (and backport as necessary)?
>>
>> I think cd-rom assignment is sufficiently obscure that we can require
>> a fixed kernel instead of providing a workaround.
> 
> Do reads fail after CD change?  Or do they succeed and the size is just
> reported incorrectly?
> 
> If it's the later, I'd agree that it needs fixing in the kernel.  If
> it's the former, I'd say it's clearly a feature.

In January 2010 I was seeing old data -- data from the prior CD -- in
the guest after the media change.

David

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