2. Get the system into the bad state and then do some deeper. Start
with outgoing ping, instrument guest driver and host vhost_net
functions to see what the drivers are doing, inspect the transmit
vring, etc.
Update: have not gotten around to reboot the server for the new
vm.
I'm going to make a list for when it happens.
Folkert van Heusden
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.
to work on a solution we can start digging deeper with #2.
I had a small script running with showed the amount of traffic coming
and going out each second. I did not see any increase or decrease in the
amount, only that when the problem happens RX stays but TX goes to 0.
Folkert van Heusden
to 3.10.3 as that is the current version in debian.
Folkert van Heusden
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!).
And the bring down interfaces / rmmod / modprobe / ifup works!
So I think something is wrong with virtio_net!
What shall I do now?
Folkert van Heusden
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=0x1.0x2 -drive
file=/dev/VGNEO/LV_V_UMTS-clone,if=none,id=drive-virtio-disk0,format=raw,cache=writeback
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-drive
file=/home/folkert/ISOs/wheezy.iso,if=none,id=drive-ide0-1-0,readonly=on,format
with
a VM losing connectivity all the time.
Hi Folkert,
I have updated the wiki to point to
http://qemu-project.org/Documentation/Networking. The original link
seems to be down.
Thanks!
If you keep losing network connectivity you may have a MAC or IP address
conflict. The symptom
) the networking on that one guest
failed.
Folkert van Heusden
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connectivity all the time.
Regards,
Folkert van Heusden
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, folkert wrote:
Nope: it failed again.
On Sun, Jul 21, 2013 at 05:20:08PM +0200, folkert wrote:
After the mail below I rebooted the whole system (e.g. the host). Since
then the guest runs fine. But this problem happened before so I'm not
confident all is fine now.
On Sun, Jul 21, 2013 at 03
, 2013 at 08:18:46PM +0200, folkert wrote:
I tried this evening to connect the vm directly to the ethernet adapter,
not a bridge in between (the bridge was completely removed). This worked
for a couple of hours then it was gone again.
The 3 other network adapters of that vm/guest were fine!
On Sun
After the mail below I rebooted the whole system (e.g. the host). Since
then the guest runs fine. But this problem happened before so I'm not
confident all is fine now.
On Sun, Jul 21, 2013 at 03:38:56AM +0200, folkert wrote:
More details: pinging from within the guest gives
ping: sendmsg
Nope: it failed again.
On Sun, Jul 21, 2013 at 05:20:08PM +0200, folkert wrote:
After the mail below I rebooted the whole system (e.g. the host). Since
then the guest runs fine. But this problem happened before so I'm not
confident all is fine now.
On Sun, Jul 21, 2013 at 03:38:56AM +0200
qemu-kvm1.1.2+dfsg-6
qemu-system 1.1.2+dfsg-6a
qemu-user 1.1.2+dfsg-6a
qemu-utils 1.1.2+dfsg-6a
Any ideas?
Folkert van Heusden
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:57:57AM +0200, folkert wrote:
Hi,
I have a guest system with 4 virtual networks, all virtio.
3 of them connected to bridges, 1 to a virtual network.
Regularly (mostly once in a few days but last 2 days already 4 times)
one specific interface stops working. The only thing then that helps
Hi,
I noticed that on my 3 VMs running server, that there are 10-20 threads
doing i/o. As the VMs are running on HDDs and not SSDs I think that is
counterproductive: won't these threads make the HDDs seek back and forth
constantly?
Folkert van Heusden
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Folkert van Heusden
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Hi,
In virt-manager I saw that there's the option for cache writeback for
storage devices.
I'm wondering: does this also make kvm to ignore write barriers invoked
by the virtual machine?
regards,
Folkert van Heusden
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