> Hello,
>
> I recently set a new server (a HP Proliant with 2 Quad Xeon 2GHz and 8GB
RAM),
> with a Slackware 13 64Bits, where I installed Xen 4.0, with the kernel
> 2.6.31.13 (the same for dom0 and for domU), and I set up a virtual mail
server
> from which several people retrieve its mail.
>
> When i try to download big files or retrieve big mails from that server, it
> often start to slow down to 4-5Kb/s untill it finally stalls after some
minutes
> of normal download (800-500Kb/s), it doesn't happen nor in the same point of
> download, nor to the same users/computers. A user can try to download a
mail,
> for example, 20 times without any success at all and then suddenly it starts
> to download correctly, and it seems to rarely happen with small mails.
>
> I tried to deactivate the ethernet checksuming, as I've seen to solve the
> problem in former versions, but it gives me an error getting the rx value:
> # ethtool -k eth0
> Offload parameters for eth0:
> Cannot get device rx csum settings: Operation not supported
> rx-checksumming: off
> tx-checksumming: off
>
> By the way, my dmesg has a bunch of these errors:
> "Attempting to checksum a non-TCP/UDP packet, dropping a protocol 1 packet"
> I'm not sure if this is also a related problem or not.
>
> Now I don't have any clue about what or where to look, so, any ideas?
>
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