On Wed, 13 Jul 2016 13:09:42 +0800
Fam Zheng <f...@redhat.com> wrote:
> v4: Drop patch 1. [Cornelia]
> Add the last trivial patch.
>
> v3: Rebase to master.
> Squash 4 into 3. [Paolo]
> Add comment and commit message. [Stefan]
> Add Stefan's r-b in patch 1 and 2.
>
> v2: Only convert virtio-{blk,scsi}. [Paolo]
>
> The benifit of this is we don't use event_notifier_set_handler even in
> non-dataplane now, which in turn makes virtio-blk and virtio-scsi follow block
> layer aio context semantics. Specifically, I/O requests must come from
> blk_get_aio_context(blk) events, rather than iohandler_get_aio_context(), so
> that bdrv_drained_begin/end will work as expected.
>
> Patch 4 reverts the hack (ab27c3b5e7) we added for 2.6. Lately, commit
> b880481579 added another pair of bdrv_drained_begin/end so the crash cannot
> happen even without ab27c3b5e7, but in order to avoid leaking requests, patch
> two is still a must.
>
> Fam Zheng (6):
> virtio: Add typedef for handle_output
> virtio: Introduce virtio_add_queue_aio
> virtio-blk: Call virtio_add_queue_aio
> virtio-scsi: Call virtio_add_queue_aio
> Revert "mirror: Workaround for unexpected iohandler events during
> completion"
> virtio-scsi: Replace HandleOutput typedef
>
> block/mirror.c | 9 ---------
> hw/block/virtio-blk.c | 2 +-
> hw/scsi/virtio-scsi.c | 14 ++++++-------
> hw/virtio/virtio.c | 45
> +++++++++++++++++++++++++++++++++--------
> include/hw/virtio/virtio-scsi.h | 6 ++----
> include/hw/virtio/virtio.h | 8 ++++++--
> 6 files changed, 52 insertions(+), 32 deletions(-)
Lightly tested with virtio-blk on s390x. Survives some disk I/O and
managedsave/restore via libvirt.
