From: David Ahern <dsahern@gmail.com>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
Juan Quintela <quintela@redhat.com>,
libvir-list@redhat.com, qemu-devel@nongnu.org,
Ryan Harper <ryanh@us.ibm.com>, Avi Kivity <avi@redhat.com>,
Amit Shah <amit.shah@redhat.com>
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 [thread overview]
Message-ID: <4D9AABE1.9030609@gmail.com> (raw)
In-Reply-To: <BANLkTi=Nc4de5ihmXGe=ao2W=_VWj1352g@mail.gmail.com>
On 04/04/11 23:33, Stefan Hajnoczi wrote:
> On Mon, Apr 4, 2011 at 6:54 PM, David Ahern <dsahern@gmail.com> 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/kvm@vger.kernel.org/msg32999.html
>
> Stefan
next prev parent reply other threads:[~2011-04-05 5:43 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-29 19:04 [Qemu-devel] [PATCH v2 0/3] block: Correct size across CD-ROM media change Stefan Hajnoczi
2011-03-29 19:04 ` [Qemu-devel] [PATCH v2 1/3] trace: Trace bdrv_set_locked() Stefan Hajnoczi
2011-03-29 19:04 ` [Qemu-devel] [PATCH v2 2/3] block: Do not cache device size for removable media Stefan Hajnoczi
2011-03-29 19:04 ` [Qemu-devel] [PATCH v2 3/3] raw-posix: Re-open host CD-ROM after media change Stefan Hajnoczi
2011-03-31 10:05 ` [Qemu-devel] " Kevin Wolf
2011-04-01 14:09 ` Stefan Hajnoczi
2011-04-03 11:57 ` [Qemu-devel] " Stefan Hajnoczi
2011-04-03 13:12 ` Blue Swirl
2011-04-03 18:06 ` Stefan Hajnoczi
2011-04-04 10:47 ` [libvirt] " Daniel P. Berrange
2011-04-04 12:58 ` Stefan Hajnoczi
2011-04-04 13:02 ` Anthony Liguori
2011-04-04 13:16 ` Daniel P. Berrange
2011-04-04 14:19 ` Anthony Liguori
2011-04-04 14:26 ` Daniel P. Berrange
2011-04-04 14:43 ` Anthony Liguori
2011-04-04 16:38 ` Blue Swirl
2011-04-04 13:22 ` Avi Kivity
2011-04-04 13:38 ` Anthony Liguori
2011-04-04 13:49 ` Avi Kivity
2011-04-04 15:09 ` Stefan Hajnoczi
2011-04-04 15:11 ` Avi Kivity
2011-04-05 6:41 ` Amit Shah
2011-04-05 7:48 ` Avi Kivity
2011-04-05 8:09 ` Amit Shah
2011-04-05 9:00 ` Avi Kivity
2011-04-05 9:12 ` Amit Shah
2011-04-05 9:17 ` Avi Kivity
2011-04-05 9:26 ` Amit Shah
2011-04-06 8:07 ` Amit Shah
2011-04-05 8:40 ` Stefan Hajnoczi
2011-04-05 8:58 ` Amit Shah
2011-04-04 17:54 ` David Ahern
2011-04-05 5:33 ` Stefan Hajnoczi
2011-04-05 5:42 ` David Ahern [this message]
2011-04-05 12:41 ` Stefan Hajnoczi
2011-03-30 8:33 ` [Qemu-devel] [PATCH v2 0/3] block: Correct size across CD-ROM " Markus Armbruster
2011-03-30 10:06 ` Stefan Hajnoczi
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