Re: [Qemu-devel] [RFC PATCH 0/2] Early release of -drive QemuOpts

[Paolo Bonzini <pbonzini@redhat.com>]

On 08/01/2016 18:37, Paolo Bonzini wrote:
> In short, this patch gets rid of blockdev_mark_auto_del and
> blockdev_auto_del.
> 
> With these patches, it is possible to create a new -drive with the same
> id as soon as the DEVICE_DELETED event is delivered (which equals to
> unrealize).
> 
> I'm sorry I'm not able to explain the history (and probably do not
> understand the full ramifications) of this.  That's why this is just
> an RFC.
> 
> The idea here is that reference counting the BlockBackend is enough to
> defer the deletion of the block device as much as necessary; anticipating
> the demise of the DriveInfo is not a problem, and has the desired effect
> of freeing the QemuOpts.
> 
> Paolo
> 
> Paolo Bonzini (2):
>   block: detach devices from DriveInfo at unrealize time
>   block: remove legacy_dinfo at blk_detach_dev time
> 
>  block/block-backend.c            | 14 ++++++++----
>  blockdev.c                       | 26 ++++++++------------------
>  hw/block/virtio-blk.c            |  4 +++-
>  hw/block/xen_disk.c              |  1 +
>  hw/core/qdev-properties-system.c |  2 +-
>  hw/ide/piix.c                    |  3 +++
>  hw/scsi/scsi-bus.c               |  4 +++-
>  hw/usb/dev-storage.c             |  3 ++-
>  include/sysemu/blockdev.h        |  5 ++---
>  9 files changed, 33 insertions(+), 29 deletions(-)
> 

Ping?  Any comments or other kinds of review? :)

Paolo