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Description of problem:
I have a couple of machines running squid under fairly heavy loads, which are
crashing every day or so (system freezes completely - requiring a power cycle).
The systems have 2 1Ghz processors, running 2.4.9-13enterprise using iptables. I
have now obtained a full stack trace from a serial console, and attach the
output from ksymoops. This seems to point to a problem in ip_conntrack.
Version-Release number of selected component (if applicable): 2.4.9-13enterprise
Steps to Reproduce:
1.run squid under a heavy load
Created attachment 43034 [details]
Output from ksymoops
The problem is still in 2.4.9-21enterprise, though the crash was slightly
different this time (see new attachment). If I change the firewall so it doesn't
use connection tracking (and make sure ip_conntrack and dependent modules aren't
loaded) then 2.4.9-13enterprise seems to be stable. I also tried a mainline
kernel 2.4.18-pre6 (based on the enterprise config from 2.4.9-13) and this seems
to be stable with connection tracking active.
Created attachment 43980 [details]
ksymoops from 2.4.9-21enterprise
This problem went away in the 2.4.18-* kernels in 7.3