Red Hat Bugzilla – Bug 537027
Timedrift on VM with pv_clock enabled, causing system hangs and sporadic time behaviour [rhel-5.4.z]
Last modified: 2015-05-04 21:18:06 EDT
This bug has been copied from bug #531268 and has been proposed to be backported to 5.4 z-stream (EUS).
in kernel-2.6.18-164.11.1.el5
tested this with guest kernel 2.6.18-164.2.1.el5, it can be reproduced host kernel: 2.6.18-164.10.1.el5 kvm version: kvm-83-105.el5_4.19 guest kernel: 2.6.18-164.2.1.el5 host cpu info: processor : 3 vendor_id : AuthenticAMD cpu family : 16 model : 2 model name : AMD Phenom(tm) 9600B Quad-Core Processor flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc nonstop_tsc pni cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy altmovcr8 abm sse4a misalignsse 3dnowprefetch osvw 1. start 2 guest: #/usr/libexec/qemu-kvm -drive file=RHEL-Server-5.4-64-virtio.qcow2,if=virtio,boot=on -no-hpet -rtc-td-hack -usbdevice tablet -startdate now -smp 2 -m 2G -net nic,model=virtio,macaddr=20:20:20:11:23:16,vlan=0 -net tap,vlan=0,script=/etc/qemu-ifup -cpu qemu64,+sse2 -name 64 -monitor stdio -vnc :6 -no-kvm-pit-reinjection #/usr/libexec/qemu-kvm -drive file=RHEL-Server-5.4-32-virtio.qcow2,if=ide -no-hpet -rtc-td-hack -usbdevice tablet -startdate now -smp 4 -m 8G -net nic,model=e1000,macaddr=20:20:20:11:23:12,vlan=0 -net tap,vlan=0,script=/etc/qemu-ifup -cpu qemu64,+sse2 -name 32 -monitor stdio -vnc :8 -no-kvm-pit-reinjection 2. run the following cmd in 64bitrhel5.4 guest: 1. while true; do sleep 1; date; done Thu Jan 14 05:15:15 EST 2010 Thu Jan 14 05:15:16 EST 2010 Thu Jan 14 05:15:17 EST 2010 Thu Jan 14 05:15:18 EST 2010 Thu Jan 14 05:15:19 EST 2010 Thu Jan 14 05:15:20 EST 2010 Thu Jan 14 05:15:21 EST 2010 Thu Jan 14 05:15:22 EST 2010 Thu Jan 14 05:15:23 EST 2010 Thu Jan 14 05:15:24 EST 2010 Thu Jan 14 05:15:10 EST 2010 Thu Jan 14 05:15:26 EST 2010 Thu Jan 14 05:15:43 EST 2010 Thu Jan 14 05:15:59 EST 2010 Thu Jan 14 05:16:16 EST 2010 Thu Jan 14 05:16:48 EST 2010 Thu Jan 14 05:16:49 EST 2010 Thu Jan 14 05:16:50 EST 2010 Thu Jan 14 05:16:51 EST 2010 Observed that time jump back and cannot see every second in stdout
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0046.html