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[Qemu-devel] Re: [PATCH 09/21] Introduce event-tap.
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] Re: [PATCH 09/21] Introduce event-tap. |
Date: |
Tue, 4 Jan 2011 11:14:53 +0000 |
On Tue, Jan 4, 2011 at 11:02 AM, Yoshiaki Tamura
<address@hidden> wrote:
> After doing some heavy load tests, I realized that we have to
> take a hybrid approach to replay for now. This is because when a
> device moves to the next state (e.g. virtio decreases inuse) is
> different between net and block. For example, virtio-net
> decreases inuse upon returning from the net layer, but virtio-blk
> does that inside of the callback. If we only use pio/mmio
> replay, even though event-tap tries to replay net requests, some
> get lost because the state has proceeded already. This doesn't
> happen with block, because the state is still old enough to
> replay. Note that using hybrid approach won't cause duplicated
> requests on the secondary.
Thanks Yoshi. I think I understand what you're saying.
Stefan
- [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Yoshiaki Tamura, 2011/01/04
- [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap.,
Stefan Hajnoczi <=
- [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Michael S. Tsirkin, 2011/01/04
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Yoshiaki Tamura, 2011/01/04
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Michael S. Tsirkin, 2011/01/04
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Yoshiaki Tamura, 2011/01/04
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Michael S. Tsirkin, 2011/01/04
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Yoshiaki Tamura, 2011/01/06
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Michael S. Tsirkin, 2011/01/06
- Re: [Qemu-devel] Re: [PATCH 09/21] Introduce event-tap., Yoshiaki Tamura, 2011/01/06