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Re: [Qemu-devel] tap devices not receiving packets from a bridge
From: |
Nicholas Thomas |
Subject: |
Re: [Qemu-devel] tap devices not receiving packets from a bridge |
Date: |
Thu, 16 May 2013 09:20:55 +0100 |
Hi,
On Thu, 2013-05-16 at 09:27 +0300, Michael S. Tsirkin wrote:
> On Thu, May 16, 2013 at 09:24:05AM +0300, Michael S. Tsirkin wrote:
> > Is this with or without vhost-net in host?
>
> never mind, I see it's without.
> Try to enable vhost-net (you'll have to switch to -netdev syntax
> for that to work) and see if this help.
> If it does it's likely a qemu bug if not probably a guest bug.
Switching to -netdev is non-trivial for me, unfortunately. Anyway, it's
definitely a qemu bug - it happens on kernels 3.2 and 3.9 with 1.4.1,
but doesn't happen with qemu 0.15.0 or 1.5.0rc1.
I'll have a dig through git to see if I can identify the patch that
resolves it. It feels-like qemu sometimes stops reading from the tap
file descriptor between ipxe exiting and the linux kernel bringing up
the network interface, and never recovers from that.
/Nick
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Nicholas Thomas, 2013/05/14
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Peter Lieven, 2013/05/14
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Nicholas Thomas, 2013/05/14
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Nicholas Thomas, 2013/05/15
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Michael S. Tsirkin, 2013/05/16
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Michael S. Tsirkin, 2013/05/16
- Re: [Qemu-devel] tap devices not receiving packets from a bridge,
Nicholas Thomas <=
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Michael S. Tsirkin, 2013/05/16
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Peter Lieven, 2013/05/16
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Nicholas Thomas, 2013/05/16
- Re: [Qemu-devel] tap devices not receiving packets from a bridge, Michael S. Tsirkin, 2013/05/16