[CentOS] Load Average ~0.40 when idle

listmail listmail at entertech.com
Sun Jul 20 01:56:44 UTC 2008

On Sat, 19 Jul 2008 21:32:42 -0400, Dan Halbert wrote
> You mentioned these are Supermicro X7DBN boards. They use the Intel
> (ESB2/Gilgal) 82563EB Dual-Port Gigabit Ethernet Controller. There's 
> an open bug here: https://bugzilla.redhat.com/show_bug.cgi?id=403121,
>  "e1000: issues with Intel ESB2/Gilgal (82563EB)". It doesn't 
> describe your problem, but complains about other issues with that 
> NIC, and references related bugs. 
Yes, I looked at the buglist for the driver and didn't see anything
related. The NICs actually work just fine at moving data. And I have
the same NICs on several other Supermicros that do not have this problem.

Just for fun, I ran a backup on one of the machines, and not only did
the Ethernet work well, but the "phantom" load went away while a real
load was running. That's what leads me to suspect a kernel or timer
bug of some sort. There was a post on the Linode site about a year ago
about something that smells similar:

But those guys are doing virtualization and using newer kernels that what
CentOS is distributing. 

I wonder if anyone else has seen this problem?


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