[Xen-users] 4gb seg fixup errors in Debian (usual hints don't seem to work)

[Fermín Galán Márquez <fermin.galan@xxxxxxx>]

Hello,

I'm getting a lot of "4gb seg fixup error" messages in the console of my
domU, that I would like to avoid (not only due to "aesthetic", it impacts
the performance, as explained at
http://wiki.xensource.com/xenwiki/XenFaq#head-e05786f1e0d6a833bc146a6096cab2
d96f2b30ae). E.g.:

4gb seg fixup, process syslogd (pid 1107), cs:ip 73:b7efc5f0
4gb seg fixup, process syslogd (pid 1107), cs:ip 73:b7efc570
4gb seg fixup, process klogd (pid 1113), cs:ip 73:b7e2e5f0
4gb seg fixup, process klogd (pid 1113), cs:ip 73:b7eafd10
printk: 38 messages suppressed.
4gb seg fixup, process named (pid 1128), cs:ip 73:b7bc5c1c

I've read some hints to solve the problem:

- The "echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf" procedure
http://lists.xensource.com/archives/html/xen-users/2006-11/msg00056.html

- The xen-divert-tls-libc script
http://wiki.xensource.com/xenwiki/DebianTlsLibcDiversion 

- The "mv /lib/tls /lib/tls.disable" procedure
http://lists.xensource.com/archives/html/xen-users/2007-03/msg00424.html

Unfortunately, I've tested all of them but no one solves the problem :(

I would like to know about any other possible solution or any further
info/pointer that could help me to debug and solve the problem, please.

My distribution is Debian testing. A list of relevant Xen-related packages
follows (it you need to know any other information regarding my system,
don't hesitate to ask it).

host:~# dpkg -l | grep xen | cut -c 1-56 | grep ii
ii  libc6-xen                       2.3.6.ds1-13
ii  linux-image-2.6-xen-686         2.6.18+6
ii  linux-image-2.6.18-4-xen-686    2.6.18.dfsg.1-11
ii  linux-image-xen-686             2.6.18+6
ii  linux-modules-2.6.18-4-xen-686  2.6.18.dfsg.1-11
ii  xen-hypervisor-3.0.3-1-i386-pae 3.0.3-0-2
ii  xen-tools                       2.8-2
ii  xen-utils-3.0.3-1               3.0.3-0-2
ii  xen-utils-common                3.0.3-0-2

Thanks in advance!

Best regards,

--------------------
Fermín Galán Márquez
CTTC - Centre Tecnològic de Telecomunicacions de Catalunya
Parc Mediterrani de la Tecnologia, Av. del Canal Olímpic s/n, 08860
Castelldefels, Spain
Room 1.02
Tel : +34 93 645 29 12
Fax : +34 93 645 29 01
Email address: fermin dot galan at cttc dot es 



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