kvm module hang

[xtrondo]

kvm module just hang the machine on "add_drv kvm", cpu:

Intel(r) Core(tm) i7-2600 CPU @ 3.40GHz

root@hydra:~# isainfo -v
64-bit amd64 applications
vmx xsave pclmulqdq aes sse4.2 sse4.1 ssse3 popcnt tscp cx16 sse3 sse2
sse fxsr mmx cmov amd_sysc cx8 tsc fpu
32-bit i386 applications
vmx xsave pclmulqdq aes sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3
sse2 sse fxsr mmx cmov sep cx8 tsc fpu

I'm available to provide any extra info/test/debug as needed
Regards,
CA,

[rmustacc]

Hi,

Just to get a bit more information. What system are you using to get the driver?

It would be worth seeing if you're actually seeing this happen when the driver unloads as opposed to when it loads (it could be being uloaded automatically). If it is, then you're seeing the same issue that is being seen in the first issue.

[xtrondo]

Hello,

-System board is an Asus P8P67 LEP67 based on rev 3 of P67 chipset, OS is openindiana 151a, the funny thing is on "very very "rare occasions it loads the module , and at that point seems to work quite good, I even manage to install CentOS 6.0 (minimal install) without any problem or issue, but later on reboot it will hang , and can only get into the system again by disable the kvm module, I guess this could be an hardware related issue because I try on other system with same cpu and Openiniana also but different system board, the module always loads, I already try to build kvm from source to include latest commits but with sames results.

Regards,
CA,

[xtrondo]

I found it was the cpu while 2600K work's in my Asus & Intel motherboard , the 2600 (the one with VT-d), does not, always han on kvm module load and I need to hard reset the system, this is expected ? is the VT-d the problem? or some other extra extension on 2600?

Regards,
CA,

[enmand]

I don't seem to have this issue myself with the version of illumos-kvm that came with the latest (December) release of SmartOS.

[rmustacc]

Yes, the workaround is present there.