Re: [Qemu-devel] [PATCH v3 0/2] virtio: improve virtio devices initialization time

[Greg Kurz <groug@kaod.org>]

On Mon, 29 Jan 2018 16:20:55 +0200
Gal Hammer <ghammer@redhat.com> wrote:

> Using a cleanup callback function (Version 2 of this patches) in order to
> support transactions fails when the same event notifier fd was used by more
> than one Memory Region.
> 
> This time I ask the caller to do the event notifier cleanup by himself.
> 

Much better ! QEMU no longer aborts. Also I could observe a speed-up when
booting a fedora27 guest with 5 virtio-serial devices (max_ports=511), from
1m40s down to 1m10s. Impressive. :)

For all the patches in this series:

Reviewed-by: Greg Kurz <groug@kaod.org>

and

Tested-by: Greg Kurz <groug@kaod.org>

> Gal Hammer (2):
>   virtio: remove event notifier cleanup call on de-assign
>   virtio: improve virtio devices initialization time
> 
>  hw/block/dataplane/virtio-blk.c |  2 ++
>  hw/scsi/virtio-scsi-dataplane.c |  2 ++
>  hw/virtio/vhost.c               |  2 ++
>  hw/virtio/virtio-bus.c          | 14 ++++++++++----
>  hw/virtio/virtio.c              | 22 +++++++++++++++++++++-
>  include/hw/virtio/virtio-bus.h  |  2 ++
>  6 files changed, 39 insertions(+), 5 deletions(-)
>