Red Hat Bugzilla – Bug 149427
DST Cache Overflow
Last modified: 2015-01-04 17:17:10 EST
Description of problem:
After a while network crashes with error messages in
/var/log/messages: kernel: dst cache overflow
Version-Release number of selected component (if applicable):
Happens sometimes (once in three or four days). But when increasing
the value of /proc/sys/net/ipv4/route/max_size to a high value and
decreasing it later to a value lower then the value in grep
ip_dst_cache /proc/slabinfo will chrash the network right away with
the same errors in /var/log/messages.
I have already increased the value of
/proc/sys/net/ipv4/route/max_size but this is slowing the server down
and only delays the eventualy crash.
firstly, update your kernel. 2.6.5 is ancient, and a hurrendous number
of bugs have been fixed since then.
Fedora Core 2 has now reached end of life, and no further updates will be
provided by Red Hat. The Fedora legacy project will be producing further kernel
updates for security problems only.
If this bug has not been fixed in the latest Fedora Core 2 update kernel, please
try to reproduce it under Fedora Core 3, and reopen if necessary, changing the
product version accordingly.