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

On 04/04/2011 04:38 PM, 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.

Even if it's a documented or intentional feature, we can add an ioctl to "refresh" the device with up-to-date data.

error compiling committee.c: too many arguments to function

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