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Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop |
Date: |
Tue, 18 Oct 2016 17:47:35 -0400 (EDT) |
----- Original Message -----
> From: "Cornelia Huck" <address@hidden>
> To: "Paolo Bonzini" <address@hidden>
> Cc: address@hidden, address@hidden, address@hidden, address@hidden,
> address@hidden
> Sent: Tuesday, October 18, 2016 7:24:45 PM
> Subject: Re: [PATCH 00/12] virtio: cleanup ioeventfd start/stop
>
> On Mon, 10 Oct 2016 13:53:28 +0200
> Paolo Bonzini <address@hidden> wrote:
>
> > This series started as an attempt to always use the dataplane path
> > for virtio-blk and virtio-scsi when ioeventfd is active. The aim
> > was three-fold:
> >
> > 1) to add more coverage for dataplane
> >
> > 2) to remove virtio_add_queue_aio
> >
> > 3) to simplify the dataplane start/stop code
> >
> > It achieves the first two objectives, and while it doesn't quite
> > achieve the third it does cleanup the generic ioeventfd code in
> > virtio-bus more than I expected. In particular, it reduces the set
> > of callbacks that transports must implement, and it removes the ugly
> > case where ioeventfd is started with generic callbacks and then moved
> > to the dataplane callbacks. It also enables some simplification of the
> > functions that deal with host notifiers, and detects some configuration
> > errors better.
> >
> > I've tested it with virtio-blk, virtio-scsi and vhost-net.
>
> Do you have a branch somewhere?
ioeventfd-virtio at git://github.com/bonzini/qemu.git
Paolo
> >
> > Patch 1 is a bugfix that I found while testing the TCG+dataplane combo.
> >
> > Patches 2 and 3 are simplifications that are too nice to leave
> > them for later in the series.
> >
> > Patch 4 moves some of the ioeventfd code from virtio-bus.c to
> > virtio.c. At this point the transition is a bit half-assed, but
> > this changes as soon as we remove the generic->dataplane
> > handler transition.
> >
> > Patches 5 to 7 do exactly that, and then the spring cleaning
> > begins, lasting for the whole second half of the series.
>
> I'll continue to look at the patches from 4 on tomorrow.
>
>
- Re: [Qemu-devel] [PATCH 10/13] virtio: remove ioeventfd_disabled altogether, (continued)
- [Qemu-devel] [PATCH 12/13] virtio: inline virtio_queue_set_host_notifier_fd_handler, Paolo Bonzini, 2016/10/10
- [Qemu-devel] [PATCH 11/13] virtio: use virtio_bus_set_host_notifier to start/stop ioeventfd, Paolo Bonzini, 2016/10/10
- [Qemu-devel] [PATCH 13/13] virtio: inline set_host_notifier_internal, Paolo Bonzini, 2016/10/10
- [Qemu-devel] [PATCH 09/13] virtio: remove set_handler argument from set_host_notifier_internal, Paolo Bonzini, 2016/10/10
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Cornelia Huck, 2016/10/18
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Cornelia Huck, 2016/10/19
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Cornelia Huck, 2016/10/19
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Paolo Bonzini, 2016/10/19
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Cornelia Huck, 2016/10/20
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Paolo Bonzini, 2016/10/20
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Cornelia Huck, 2016/10/21