On Thu, February 16, 2012 1:24 pm, Dmitry E. Mikhailov wrote: > Hi, > > About half a year ago I installed a stock CentOS 6.0/64bit onto an Intel > server to virtualize our Linux fileserver and four WinXP boxes with rdp each. > > Since recent times I didn't do any upgrades of the server's OS. Now I have > CentOS 6.2. > > After an upgrade I noticed that all virtual cpu name changed to > QEMU Virtual CPU version (cpu64-rhel6) > > Second, a killer app on one of WinXP servers stopped working since upgrade. > It's a russian proprietary accounting app named 1C ver. 8.1 (1cv8.exe). It > would just hang loading single virtual CPU to 100%. I traced by > trial-and-error that the problem is related to virtual CPU identification. > Following solution would help: > <cpu match='exact'> > <model>Penryn</model> > <vendor>Intel</vendor> > <feature policy='require' name='tm2'/> > <feature policy='require' name='est'/> > <feature policy='require' name='monitor'/> > <feature policy='require' name='ds'/> > <feature policy='require' name='ss'/> > <feature policy='require' name='vme'/> > <feature policy='require' name='ht'/> > <feature policy='require' name='dca'/> > <feature policy='require' name='pbe'/> > <feature policy='require' name='tm'/> > <feature policy='require' name='vmx'/> > <feature policy='require' name='ds_cpl'/> > <feature policy='require' name='xtpr'/> > <feature policy='require' name='acpi'/> > <feature policy='disable' name='nx'/> > <feature policy='disable' name='pae'/> > </cpu> > It wasn't working before I disabled PAE and NX. > Double checked. If I delete <cpu> part and thus leave it 'default', the > application won't work. Dmitry, I'd like to thank you for this post. I was having the same issue as your number 2. For me, it was an application running on windows 7, but the description of it loading at 100% was exact. I too went down the path of the virtual cpu change and setting the cpu type. I never managed to solve it until i say your post. I had the exact same require settings, but no disable settings. For my app, all I had to do was disable NX. I still have PAE enabled. Rather I have the generic feature enabled instead of tied to a CPU. Up until now, I had marked it down as bios issue, since I believe the bios had changed from centos 5.7 to 6.2. I had put the issue on a back burner since it wasn't a critical app and I was able to run in on a physical windows 7 box. Have you checked /usr/share/qemu-kvm/cpu-model/cpu-x86_64.conf to see what has changed from 6.0 to 6.2? The equivalent doesn't exist on my centos 5.7 box, so I'm having trouble determining the defaults from 5.7. Brad -- Bradley Leonard EMail: bradley at stygianresearch.com Rob - "The hills are alive with the..the..sound of monkeys?" Bucky - "It's in the key of delicious." Life is simple. Humans make it complicated. _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
