I am by no means an expert at this. I just have a lot of fresh wounds I learned from. - Use NTP only in Xen dom0. - Turn off NTP in Windows domU, force it to just use system time. It will stay current from Xen, at least that is what I see here. - Check your xm dmesg, if you are getting NMI warnings from that dom# I am pretty sure that is the clock conflict and it bluescreens me. I fixed it with above. - Maybe post your domU conf file for it too. Will compare to mine. I have been stable for a week now and the clock is running true. - I will accept that you are using well under 4g ram as reported in Windows Taskmanager. - How many vcpu's did you give dom0. I could NOT get Windows to run with two cpus without giving dom0 MORE than one vcpu. I finally let it have them all, I reserved cpu0 for dom0 and I have never seen it use more than one cpu and generally it will stay there in in cpu0/vcpu0. If anything overall performance is the same, maybe better. I do not think SMP will work if dom0 doesn't have at least 2 cpus/vcpus at its disposal. This is all stock Centos-Xen yum current. - Make sure you don't have nosmp (toggled off) in your grub.conf. - Keep your /var/lib/xen folder clean of vestiges from crashes. Veli-Pekka Kestilä wrote: > Ben M. wrote: >> I had that issue when I first installed. The clock still acts up once in >> a while if I take the system down entirely for a few hours, which won't >> happen now that it is in the rack. >> >> This seems to work for me at the moment, with or without Xen GPLPV, >> though GPLPV "safens" your install (Registry Hive errors without it). >> YMMV and I am not shaken out yet! >> > I have also installed the GPLPV drivers. But they didn't help with > crashes when trying to use two CPU >> - I haven't tried a Win2K3 installation yet. So far I am very >> disappointed with Win2K8 and I'm calling Windows Vista Server here. >> 20gigs of partition space needed (excluding sql express) to just serve >> the first, static, web page? Gimme a break! >> > Well the W2K3 seems to work without problems. Although those virtual > machines only use one CPU so can't know for sure. > > Memory use really isn't problem. But the issue still remains that I > would need some way to get Windows 2008 to relax the timing requirements > for the CPU's. So that it wouldn't do the BSOD's on the missed clock > interrupts. And don't want to go back to 2003 as these machines will > most probably be running next 5-years with this os. > > -vpk > > > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt >