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Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue l
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit |
Date: |
Tue, 28 Apr 2015 09:14:07 +0200 |
On Tue, Apr 28, 2015 at 02:13:20PM +0800, Jason Wang wrote:
>
>
> On Tue, Apr 28, 2015 at 1:13 PM, Michael S. Tsirkin <address@hidden> wrote:
> >On Tue, Apr 28, 2015 at 11:14:04AM +0800, Jason Wang wrote:
> >> On Mon, Apr 27, 2015 at 7:05 PM, Michael S. Tsirkin
> >><address@hidden> wrote:
> >> >On Thu, Apr 23, 2015 at 02:21:41PM +0800, Jason Wang wrote:
> >> >> This patch introduces a bus specific queue limitation. It will be
> >> >> useful for increasing the limit for one of the bus without
> >>disturbing
> >> >> other buses.
> >> >> Cc: Michael S. Tsirkin <address@hidden>
> >> >> Cc: Alexander Graf <address@hidden>
> >> >> Cc: Richard Henderson <address@hidden>
> >> >> Cc: Cornelia Huck <address@hidden>
> >> >> Cc: Christian Borntraeger <address@hidden>
> >> >> Cc: Paolo Bonzini <address@hidden>
> >> >> Signed-off-by: Jason Wang <address@hidden>
> >> >> Reviewed-by: Cornelia Huck <address@hidden>
> >> >
> >> >Is this still needed if you drop the attempt to
> >> >keep the limit around for old machine types?
> >> If we agree to drop, we probably need transport specific macro.
> >
> >You mean just rename VIRTIO_PCI_QUEUE_MAX to VIRTIO_QUEUE_MAX?
> >Fine, why not.
>
> I mean keeping VIRTIO_PCI_QUEUE_MAX for pci only and just increase pci
> limit. And introduce e.g VIRTIO_PCI_QUEUE_CCW for ccw and keep it as 64.
> Since to my understanding, it's not safe to increase the limit for all other
> transports which was pointed out by Cornelia in V1:
> http://permalink.gmane.org/gmane.comp.emulators.qemu/318245.
I think all you need is add a check to CCW_CMD_SET_IND:
limit to 64 for legacy interrupts only.
--
MST
- Re: [Qemu-devel] [PATCH V7 04/16] ppc: spapr: add 2.4 machine type, (continued)
- [Qemu-devel] [PATCH V7 05/16] monitor: replace the magic number 255 with MAX_QUEUE_NUM, Jason Wang, 2015/04/23
- [Qemu-devel] [PATCH V7 06/16] monitor: check return value of qemu_find_net_clients_except(), Jason Wang, 2015/04/23
- [Qemu-devel] [PATCH V7 07/16] virtio-ccw: using VIRTIO_NO_VECTOR instead of 0 for invalid virtqueue, Jason Wang, 2015/04/23
- [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Jason Wang, 2015/04/23
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/27
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Jason Wang, 2015/04/27
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Jason Wang, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit,
Michael S. Tsirkin <=
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Cornelia Huck, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Cornelia Huck, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Cornelia Huck, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Cornelia Huck, 2015/04/28
- Re: [Qemu-devel] [PATCH V7 08/16] virtio: introduce bus specific queue limit, Michael S. Tsirkin, 2015/04/28
[Qemu-devel] [PATCH V7 09/16] virtio-ccw: introduce ccw specific queue limit, Jason Wang, 2015/04/23