Re: Loss of network connectivity with high load

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I've had the same issues too. I'm using Gentoo.
Kernel packages < 2.6.32-r7 (Release 7 not RC-7)
have had this problem. Haven't tested -r8 to -r10.
Kernel 2.6.32-r11 is currently working fine. 2.6.34
was working too but it crashed after two days with a
clock syncing issue. I'm hopping that 2.6.32-r11 doesn't
have this issue. It's currently running for 24 hours
now. KVM is 0.12.4.

- Robert


On 06/22/10 14:32, Thomas Besser wrote:
> Thomas Besser wrote:
>>> On Wednesday, 16 June 2010 17:14:54 +0300,
>>> Avi Kivity wrote:
>>>> 2.6.26 is really old.  Can you try a new kernel in the guest?  Recent
>>>> kernels had many virtio fixes.
>> I think we have the same problem here: after about 3 GB of transfered data
>> with rsync, network (virtio) in the guest stops working (restart of
>> network solves the network stop).
>>
>> Both host and guest Debian Lenny with 2.6.32. qemu-kvm is version 0.12.4.
>> Will try 2.6.34 in guest and report, if the problem still exists.
> 
> With a 2.6.34 guest kernel the problem seems to be gone (after about 6 GB 
> transferred data).
> 
> Regards
> Thomas
> 
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