Latest working kernel version: kernel-xen-2.6.21.7-5.fc8.i686 Earliest failing kernel version: kernel-PAE-2.6.27.7-134.fc10.i686 Distribution: Fedora 10 Hardware Environment: this problematic guest is running on Fedora 8 dom0 Software Environment: kernel-xen-2.6.21.7-5.fc8, xen-3.1.2-5.fc8 Problem Description: After some time (aprox. 1-2 days) my server has many of processes in state "D". Mostly they are postfix, dovecot, crond and mysql. They blocks my server which after some time hangs. Problem started after upgrade to Fedora 10, on Fedora 8 there was no problems with same configuration. Curious, that after reboot all my logged data is gone. This one is a copy created before reboot of my machine. Command "sync" also fails after this problem started. May be something is with xen blk driver. My dom0 is an fully updated Fedora 8. Guest is an paravirtualized guest on lvm disk storages. Steps to reproduce: I can't reproduce this. It only happens every 1-2 days. Same problems for kernel.x86_64 and kernel-PAE.i386. This bug has been also reported at redhat bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=478414
Forgot to say, that logs are here: http://www.salstar.sk/fedora-error/ Before debugging there was nothing special in dmesg or messages.
After downgrade to fc8 kernel my system is up more than 3 days. I think there is something wrong with fc10 kernels.