Re: [Qemu-devel] [PATCHv2] virtio: verify that all outstanding buffers are flushed

[Paolo Bonzini]

Il 12/12/2012 14:50, Stefan Hajnoczi ha scritto:
> VirtIOBlock->rq can trigger the assertion.
> 
> IIUC hw/virtio-blk.c may handle I/O errors by keeping the request
> pending and on a list (->rq).  This allows the user to restart them
> after, for example, adding more space to the host file system containing
> the disk image file.
> 
> We keep a list of failed requests and we migrate this list.  So I think
> inuse != 0 when migrating with pending failed I/O requests.

Same for virtio-scsi.  Each request in that case is sent as part of the
SCSIDevice that it refers to, via callbacks in SCSIBusInfo.

Paolo