Re: [Qemu-devel] [PATCH] qom: removal of link property need to release its target

[Paolo Bonzini]

Il 23/08/2012 00:40, Anthony Liguori ha scritto:
> I don't really like the notion of a "forced eject" where we delete a
> device when the guest is using it and not cooperative.  I don't see the
> benefit at all.
> 
> Forcing detachment of a BlockDriverState from a device followed by EIO
> being reported to the guest for all I/O ops makes sense to me.  But not
> forced removal of virtio-blk-pci.

PCI express even has support for detecting surprise removal early (with
card presence detection pins, that break contact before others) and
remove power before damaging the hardware.  It's very much a real thing.

You could surprise-remove an assigned card from under the feet of a
non-cooperating guest, for example.

Paolo