[Users] 4gb seg fixup - centos5 HN and VE, with Xen

Henrik Holmboe henrik at holmboe.se
Thu Nov 27 03:44:35 EST 2008

Hello again,

did anyone have a clue what might be the problem with my setup (below)?
Sorry to send a repost but the problem still persists and I don't know
where to go from here. Tried the IRC channel but it was probably mostly
idle at that time.


++ 23/11/08 13:39 +0100 - Henrik Holmboe:
>Hello all,
>I have a setup which might not be the intended use for Xen flavor of the
>kernel provided by OpenVZ. I am running a Centos 5.2 Xen dom0, which in
>turn runs a Centos 5.2 domU. There is no problem at all when I boot that
>domU using the Centos provided kernel, but when I boot the latest Xen
>flavor of OpenVZ kernel, then I get alot messages similar to the below
>on the console:
>4gb seg fixup, process klogd (pid 4309), cs:ip 73:001d1aa0
>4gb seg fixup, process syslogd (pid 4306), cs:ip 73:00276830
>printk: 21 messages suppressed.
>4gb seg fixup, process automount (pid 4365), cs:ip 73:00cdd36c
>printk: 102 messages suppressed.
>Both the Xen dom0 and domU are updated as of today.
>Xen domO:
>[root at dom0 ~]# uname -r
>Centos domU (not seeing the problem):
>[root at domu ~]# uname -r
>OpenVZ domU (seeing the console error messages):
>[root at domu ~]# uname -r
>When I search the mail archive and other resources on the internet they
>recommend two possible solutions to this problem. However neither of
>them seem to solve it for me.
>Suggested solution 1:
>[root at domu ~]# mv /lib/tls /lib/tls.disabled
>[root at domu ~]# reboot
>Suggested solution 2:
>[root at domu ~]# echo "hwcap 0 nosegneg" > /etc/ld.so.conf.d/nosegneg.conf
>[root at domu ~]# reboot
>Notice that both solutions have been tried on the domU and not dom0.
>Can't remember if I tried them on dom0 as well, but probably not since
>it doesn't seem likely that it could affect the domU.
>There is the file
>/etc/ld.so.conf.d/kernelcap-2.6.18-92.1.13.el5.028stab059.6.conf that
>contains the same as solution 2, so it should already be in effect.
>Have anyone of you tested this setup? I don't know where to go from here
>so I'm hoping for some input from you guys.
>Henrik Holmboe, Stockholm, Sweden
>Users mailing list
>Users at openvz.org

Henrik Holmboe, Stockholm, Sweden

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