On Fri, Jan 27, 2012 at 02:55:12PM +0100, Kevin Wolf wrote: > Am 27.01.2012 14:34, schrieb Joerg Roedel: > > On Fri, Jan 27, 2012 at 01:58:38PM +0100, Kevin Wolf wrote: > >> Am 25.01.2012 17:00, schrieb Joerg Roedel: > > > >> I just retried. I use kvm-kmod and kvm.git with HEAD at ff92e9b5 plus > >> the tree patches of this series plus a printk to output exit_int_info in > >> task_switch_intercept(). I ran taskswitch2 from kvm-unittests and got > >> two failures and my VM86 unit test which hung when trying to return from > >> VM86. I also ran the kernel that made me aware of the issue initially. > >> All debug messages show exit_int_info = 0. > > > > Okay, you are testing on a K8 which has exactly this bug. As I just > > found out it is documented as erratum 701. The good news is that this > > only happens on K8 and Fam11h, any later AMD processor doesn't have this > > bug. > > Meh. Unless you give me a newer processor, this doesn't really help > me... Doesn't look like there's any way to get a workaround, is there? I > guess I'll have to hack it locally and possibly break other guests with > the hacked module. No, unfortunatly there is no workaround for this problem. How do you plan to hack around it? Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
