Hi, The message log belongs to the guest which will become unresponsive from time to time. I have done the following and it report the same both on host as well as guest: [root at localhost conf]# cat /proc/sys/kernel/tainted 65 YongSan On Fri, Oct 15, 2010 at 1:27 AM, Eric Searcy <emsearcy at gmail.com> wrote: > On Oct 14, 2010, at 1:38 AM, Poh Yong Hwang wrote: > > > Hi, > > > > I have one KVM instance (centos 5) that keeps crashing and i see the > message log with the following: > > > > Oct 14 16:24:48 localhost kernel: psmouse.c: Explorer Mouse at > isa0060/serio1/input0 lost synchronization, throwing 1 bytes away. > > Oct 14 16:24:49 localhost kernel: BUG: soft lockup - CPU#0 stuck for 12s! > [ntpd:2363] > > Oct 14 16:24:49 localhost kernel: CPU 0: > > Oct 14 16:24:49 localhost kernel: Modules linked in: backupdriver(PU) > ipv6 xfrm_nalgo crypto_api autofs4 hidp rfcomm l2cap bluetooth lockd sunrpc > talpa_pedevice(U) dm_mirror dm_multipath scsi_dh video backlight sbs > power_meter hwmon i2c_ec dell_wmi wmi button battery asus_acpi > acpi_memhotplug ac parport_pc lp parport floppy virtio_balloon virtio_pci > ide_cd i2c_piix4 virtio_ring 8139too cdrom 8139cp pcspkr i2c_core virtio mii > serio_raw dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache > ata_piix libata sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd > > Oct 14 16:24:49 localhost kernel: Pid: 2363, comm: ntpd Tainted: P > 2.6.18-194.3.1.el5 #1 > [...] > > Afterwhich the instance become very sluggish and unresponsive. Please > advise what could be the issue. > > I'm no expert on kernel stuff, but I thought I'd throw in a couple > suggested points of clarification on your request since the above is not > clear to me. > > Is the above in /var/log/message on the guest or host? > > Is it always an "ntpd" process on the CPU#0 stuck/soft lockup line? Does > the soft lockup always occur after a psmouse.c warning? (Even so, the > psmouse.c warning could maybe be a symptom of the CPU being stuck, not the > cause...) > > What type of hardware is this? Noticing that is says "tainted" and I'm > assuming this is the kernel (as I have no idea how a userland process, ntpd, > could be "tainted"!), then you have a binary-distributed kernel module and > you should probably try with that unloaded to see if the issue goes away. > It could be a machine check error, but that's less likely I think. To > double check, run the following in both the host and guest: > > cat /proc/sys/kernel/tainted > > This ORed value can be checked against the flags given in > http://www.kernel.org/doc/Documentation/sysctl/kernel.txt > > Eric > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20101015/00bc705b/attachment-0005.html>