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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: |
Wed, 21 Sep 2016 18:43:29 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 |
On 21/09/2016 16:01, Christian Borntraeger wrote:
> On 09/21/2016 03:18 PM, Paolo Bonzini 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.
>>
>> I've tested it with virtio-blk, virtio-scsi and vhost-net.
>>
>> Patches 1 and 2 are simplifications that are too nice to leave
>> them for later in the series.
>>
>> Patch 3 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 4 to 6 do exactly that, and then the spring cleaning
>> begins, lasting for the whole second half of the series.
>>
>> Opinions, reviews and bug reports?
>
> is there a branch?
ioeventfd-virtio in my github repo.
- [Qemu-devel] [PATCH 06/12] virtio-scsi: always use dataplane path if ioeventfd is active, (continued)
- [Qemu-devel] [PATCH 06/12] virtio-scsi: always use dataplane path if ioeventfd is active, Paolo Bonzini, 2016/09/21
- [Qemu-devel] [PATCH 11/12] virtio: inline virtio_queue_set_host_notifier_fd_handler, Paolo Bonzini, 2016/09/21
- [Qemu-devel] [PATCH 10/12] virtio: do not export set_host_notifier_internal, Paolo Bonzini, 2016/09/21
- [Qemu-devel] [PATCH 09/12] virtio: remove ioeventfd_disabled altogether, Paolo Bonzini, 2016/09/21
- [Qemu-devel] [PATCH 08/12] virtio: remove set_handler argument from set_host_notifier_internal, Paolo Bonzini, 2016/09/21
- [Qemu-devel] [PATCH 12/12] virtio: inline set_host_notifier_internal, Paolo Bonzini, 2016/09/21
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Christian Borntraeger, 2016/09/21
- Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop,
Paolo Bonzini <=
Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Michael S. Tsirkin, 2016/09/21
Re: [Qemu-devel] [PATCH 00/12] virtio: cleanup ioeventfd start/stop, Stefan Hajnoczi, 2016/09/30