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Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after med
From: |
David Ahern |
Subject: |
Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change |
Date: |
Mon, 04 Apr 2011 23:42:57 -0600 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Thunderbird/3.1.9 |
On 04/04/11 23:33, Stefan Hajnoczi wrote:
> On Mon, Apr 4, 2011 at 6:54 PM, David Ahern <address@hidden> wrote:
>> 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.
>
> Yikes. Is there a bug report for this? What are the steps to reproduce it?
Not that I know of. It is reported by someone else last year as well:
http://www.mail-archive.com/address@hidden/msg32999.html
>
> Stefan
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, (continued)
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Amit Shah, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Avi Kivity, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Amit Shah, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Avi Kivity, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Amit Shah, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Amit Shah, 2011/04/06
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Stefan Hajnoczi, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Amit Shah, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, David Ahern, 2011/04/04
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Stefan Hajnoczi, 2011/04/05
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change,
David Ahern <=
- Re: [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change, Stefan Hajnoczi, 2011/04/05