Description of problem: Messages appear on the guest console: Timer ISR/0: Time went backwards: delta=11634587 cpu_delta=-24365413 shadow=35565089595542 off=454469268 processed=35565532429717 cpu_processed=35565568429717 0: 35565568429717 Timer ISR/0: Time went backwards: delta=13582138 cpu_delta=-14417862 shadow=35565089595542 off=464416801 processed=35565540429717 cpu_processed=35565568429717 0: 35565568429717 Timer ISR/0: Time went backwards: delta=7590509 cpu_delta=-4409491 shadow=35565089595542 off=514425246 processed=35565596429717 cpu_processed=35565608429717 0: 35565608429717 Version-Release number of selected component (if applicable): Linux version 2.6.16-1.2111_FC5xenU (bhcompile.redhat.com) (gcc version 4.1.0 20060304 (Red Hat 4.1.0-3)) #1 SMP Thu May 4 21:47:01 EDT 2006 How reproducible: Not often. Steps to Reproduce: 1. Boot a guest 2. scp a kernel over Actual results: Messages Expected results: No messages Additional info: The guest's operation does not seem to be detrimentally affected. This started with 2.6.16-1.2111_FC5xenU. The kernel 2.6.15-1.2054_FC5xenU does not seem to exibit this. The scp is obviously a contributor, but there's something else to it. The scp was ran from the dom0 to domU, locally.
Seen on 2.6.16-1.2111_FC5xen0: Timer ISR/0: Time went backwards: delta=12511597 cpu_delta=-7488403 shadow=1146005506824 off=279005630 processed=1146272000000 cpu_processed=1146292000000 0: 1146292000000 1: 1146232000000 Timer ISR/0: Time went backwards: delta=13015031 cpu_delta=-6984969 shadow=1158005560849 off=59454846 processed=1158052000000 cpu_processed=1158072000000 0: 1158072000000 1: 1158016000000 Timer ISR/0: Time went backwards: delta=5019916 cpu_delta=-18980084 shadow=1159005567610 off=259453208 processed=1159260000000 cpu_processed=1159284000000 0: 1159284000000 1: 1159216000000 Timer ISR/0: Time went backwards: delta=3025796 cpu_delta=-8974204 shadow=1159005567610 off=269458715 processed=1159272000000 cpu_processed=1159284000000 0: 1159284000000 1: 1159272000000 Timer ISR/0: Time went backwards: delta=13015910 cpu_delta=-6984090 shadow=1163005596130 off=339420554 processed=1163332000000 cpu_processed=1163352000000 0: 1163352000000 1: 1163316000000
This bug appears to have been solved upstream, and should no longer be present in current kernels. Please reopen if you can somehow reproduce it.