Hi,
We are running xen on fc6 host and all domU are also fc6, the only issue we are currently facing is getting lot of error messages in logs
Dec 20 13:06:37 kernel: 4gb seg fixup, process syslogd (pid 873), cs:ip 73:00259ea0 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:001e63a0 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:00268e50 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:001e63a0 Dec 20 13:06:42 kernel: printk: 21 messages suppressed. Dec 20 13:06:42 kernel: 4gb seg fixup, process master (pid 997), cs:ip 73:003b3cfc Dec 20 13:06:48 kernel: printk: 30 messages suppressed. Dec 20 13:06:48 kernel: 4gb seg fixup, process sshd (pid 1121), cs:ip 73:003a4cfc Dec 20 13:06:50 kernel: printk: 57 messages suppressed. Dec 20 13:06:50 kernel: 4gb seg fixup, process sshd (pid 1121), cs:ip 73:003a4cfc
getting these error eventually for all processes and on all fc6 domU, I have tried the fix mention in one of thread ie ..
I've done all of that without success. Any other ideas?
I've renamed /lib/tls to /lib/tls.disabled and echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf
But still getting these error message in domU log file and also on console when access it via console which makes domU console unusable.
Any help in this regards, will be greatly appreciated.
Thanks. Askar
On Wed, Dec 20, 2006 at 06:28:03PM +0500, Asrai khn wrote:
Hi,
We are running xen on fc6 host and all domU are also fc6, the only issue we are currently facing is getting lot of error messages in logs
Dec 20 13:06:37 kernel: 4gb seg fixup, process syslogd (pid 873), cs:ip 73:00259ea0 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:001e63a0 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:00268e50 Dec 20 13:06:37 kernel: 4gb seg fixup, process klogd (pid 876), cs:ip 73:001e63a0 Dec 20 13:06:42 kernel: printk: 21 messages suppressed. Dec 20 13:06:42 kernel: 4gb seg fixup, process master (pid 997), cs:ip 73:003b3cfc Dec 20 13:06:48 kernel: printk: 30 messages suppressed. Dec 20 13:06:48 kernel: 4gb seg fixup, process sshd (pid 1121), cs:ip 73:003a4cfc Dec 20 13:06:50 kernel: printk: 57 messages suppressed. Dec 20 13:06:50 kernel: 4gb seg fixup, process sshd (pid 1121), cs:ip 73:003a4cfc
getting these error eventually for all processes and on all fc6 domU, I have tried the fix mention in one of thread ie ..
I've done all of that without success. Any other ideas?
I've renamed /lib/tls to /lib/tls.disabled and echo 'hwcap 0 nosegneg' > /etc/ld.so.conf.d/libc6-xen.conf
Both of those are redundant/wrong for FC6.
First, there is no separate /lib/tls anymore - FC6 ditched old pthreads implementation, and the new NPTL is the default in /lib. So renaming the empty /lib/tls directory is irrelevant.
Second, the 'hwcap 0 nosegneg' stuff is automatically installed by the Xen kernel RPM, eg
$ rpm -qf /etc/ld.so.conf.d/kernelcap-2.6.18-1.2868.fc6.conf kernel-xen-2.6.18-1.2868.fc6
$ cat /etc/ld.so.conf.d/kernelcap-2.6.18-1.2868.fc6.conf # This directive teaches ldconfig to search in nosegneg subdirectories # and cache the DSOs there with extra bit 0 set in their hwcap match # fields. In Xen guest kernels, the vDSO tells the dynamic linker to # search in nosegneg subdirectories and to match this extra hwcap bit # in the ld.so.cache file. hwcap 0 nosegneg
But still getting these error message in domU log file and also on console when access it via console which makes domU console unusable.
What kernel version are you running & what kernel-xen & libc RPMs are installed in your guest showing this problem. Also are they successfully (eg, rpm -V kernel-xen libc)
Dan.
Hi Dan,
Both of those are redundant/wrong for FC6.
First, there is no separate /lib/tls anymore - FC6 ditched old pthreads implementation, and the new NPTL is the default in /lib. So renaming the empty /lib/tls directory is irrelevant.
Second, the 'hwcap 0 nosegneg' stuff is automatically installed by the Xen kernel RPM, eg
$ rpm -qf /etc/ld.so.conf.d/kernelcap-2.6.18-1.2868.fc6.conf kernel-xen-2.6.18-1.2868.fc6
When i do this on host machine gives me...
rpm -qf /etc/ld.so.conf.d/kernelcap-2.6.18-1.2849.fc6.conf kernel-xen-2.6.18-1.2849.fc6
but gives nothing on guest, i don't have /etc/ld.so.conf.d/kernelcap- 2.6.18-1.2849.fc6.conf on guests
$ cat /etc/ld.so.conf.d/kernelcap-2.6.18-1.2868.fc6.conf
# This directive teaches ldconfig to search in nosegneg subdirectories # and cache the DSOs there with extra bit 0 set in their hwcap match # fields. In Xen guest kernels, the vDSO tells the dynamic linker to # search in nosegneg subdirectories and to match this extra hwcap bit # in the ld.so.cache file. hwcap 0 nosegneg
But still getting these error message in domU log file and also on console when access it via console which makes domU console unusable.
What kernel version are you running & what kernel-xen & libc RPMs are installed in your guest showing this problem. Also are they successfully (eg, rpm -V kernel-xen libc)
I'm launching guest using xm create vms.cfg
and vms.cfg is as under
kernel = "/boot/vmlinuz-2.6.18-1.2849.fc6xen" ramdisk = "/boot/initrd-2.6.18-1.2849.fc6xen-domU.img" memory = 128 name = "xxxx" #vif = [ 'mac=00:16:3e:11:69:85, bridge=xenbr0' ] vif = [ 'ip=66.xxx.xxx.xxx' ] disk = ['tap:aio:/var/uml/vm3/root,sda1,w', 'tap:aio:/var/uml/vm3/var,sda2,w', 'tap:aio:/var/uml/vm3/swap,sda3,w'] root = "/dev/sda1 ro" on_reboot = 'restart' on_crash = 'restart'
So the kernel running on guest ... and i have also copied the xen kernel modules /lib/modules/ on guest disk image by mounting it.
uname -r 2.6.18-1.2849.fc6xen
Secondly the default initrd for xen kernel that come with fc6 fails to start our guest so i have created initrd manually by ...
mkinitrd -f --with=xennet --preload=xenblk /boot/initrd- 2.6.18-1.2849.fc6xen-domU.img 2.6.18-1.2849.fc6xen
and then use this initrd for 'ramdisk' in vms.cfg
Thanks.
-
Asrai khn -
Daniel P. Berrange