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[Qemu-devel] BUG - qdev - partial loss of network connectivity
From: |
Leszek Urbanski |
Subject: |
[Qemu-devel] BUG - qdev - partial loss of network connectivity |
Date: |
Wed, 22 Sep 2010 19:18:32 +0200 |
User-agent: |
Mutt/1.4.2.3i |
Hi,
This is a qemu-kvm (i.e. not qemu) bug report. I've been told on IRC (#kvm)
that this bug report should go to this list anyway.
host and guest kernel: 2.6.32.22
arch: amd64
qemu-kvm: 0.12.5 and 0.13.0-rc1
How to reproduce: copy a large (few hundred MB) file to an NFS mount
(guest is the client), using qdev syntax for virtio:
-device virtio-net-pci,netdev=tap1,mac=ab:cd:ef:01:23:45 \
-netdev type=tap,id=tap1,ifname=tap1
all NFS mounts immediately stall and processes go into D state and are stuck
on nfs_wait_bit_uninterruptible. There is no further communication between
the client and the server. It occurs with UDP and TCP mounts.
That same guest, when switched to the old -net/-net syntax:
-net nic,vlan=0,model=virtio,name=eth0,macaddr=ab:cd:ef:01:23:45 \
-net tap,vlan=0,ifname=tap1
works fine. It also works fine on bare metal.
I can reproduce the problem every time within 10 minutes with qdev.
--
Leszek "Tygrys" Urbanski, SCSA, SCNA
"Unix-to-Unix Copy Program;" said PDP-1. "You will never find a more
wretched hive of bugs and flamers. We must be cautious." -- DECWARS
http://cygnus.moo.pl/ -- Cygnus High Altitude Balloon
- [Qemu-devel] BUG - qdev - partial loss of network connectivity,
Leszek Urbanski <=
- Re: [Qemu-devel] BUG - qdev - partial loss of network connectivity, Anthony Liguori, 2010/09/22
- Re: [Qemu-devel] BUG - qdev - partial loss of network connectivity, Leszek Urbanski, 2010/09/22
- Re: [Qemu-devel] BUG - qdev - partial loss of network connectivity, Anthony Liguori, 2010/09/22
- Re: [Qemu-devel] BUG - qdev - partial loss of network connectivity, Leszek Urbanski, 2010/09/23
- [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity, Michael S. Tsirkin, 2010/09/26
- [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity, Leszek Urbanski, 2010/09/27
- [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity, Michael S. Tsirkin, 2010/09/28