Solved: Re: CentOS 5 ssloooowww when network unavailable

[Mark Nejedlo <nejedlo@xxxxxxxxxxx>]

I seem to have found the cause of my network issues.  It appears that
the CentOS 5 kernel is not handling shared IRQs properly.  My USB
keyboard and mouse were on the same IRQ as my ethernet controller.

Initially, the network would be working, but as soon as there was
keyboard or mouse activity, the network stopped.  After that the network
would only work if the keyboard or mouse was active.

Moving the keyboard and mouse to a different USB port seems to have
completely cleared up the problem.

Good and bad dmesgs at URLs below.

Mark

http://www.cs.wisc.edu/~nejedlo/dmesg.good
http://www.cs.wisc.edu/~nejedlo/dmesg.bad
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