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Archive for November, 2008

4gb seg fixup errors on Debian Lenny Xen domU

I run CompleteFusion, and several other sites, on a virtual server hosted at VPSLink.  Recently, I upgraded the server from Debian Etch to Lenny.  After the upgrade, I've noticed errors like the following in the output from dmesg:

4gb seg fixup, process imap-login (pid 29663), cs:ip 73:002d9226
printk: 121 messages suppressed.

Some basic investigation revealed that this is apparently a fairly common issue with Xen domU instances, but it should be easy to fix:

  • First, make sure libc6-xen is installed: apt-get install libc6-xen
  • If /lib/tls exists on your system (it didn't on mine): mv /lib/tls /lib/tls.disabled
  • echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf && ldconfig
  • Reboot your domU
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