[TriLUG] Kernel crash when QOS enabled

[David Both]

Check the logs and/or configure the startup to show startup messages rather than 
the GUI progress indicator. Look to see any messaged pertaining to the disks. I 
suspect that fsck is running during the startup after the crash and that is what 
is taking the time. Install/enable SAR and look for the reasons for the crash in 
the SAR data. That is probably due to running out of memory; if so add RAM not 
swap space.

On 07/16/2013 11:12 AM, Bill Farrow wrote:
> At work I admin an Ubuntu Small Business Server (Zentyal).  When I
> enable QOS (Traffic Shaping), the kernel crashes approx 3 hours later
> with flashing keyboard LEDs.  Rebooting after the crash takes much
> longer than normal to boot before I can get console log-in and before
> all services are restored.
>
> Key features:
> - 4 core Intel Xeon E5620 (hyperthreaded to 8 cores)
> - multiple KVM virtual machines
> - Multiple Software RAID1 arrays
> - LVM
> - NAT, DNS, DHCP, samba, iptables firewall, bridged interfaces
> - multiple subnets
>
> I will have to replicate this on a separate machine, as extended
> downtime on the real server will not be acceptable.  Any hints on what
> I area should look at first ?
>
> Bill

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*********************************************************
David P. Both



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David P. Both, RHCE
Millennium Technology Consulting LLC
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