On Dec 11, 2007 11:24 AM, Neil Horman <nhorman at tuxdriver.com> wrote: > On Tue, Dec 11, 2007 at 11:46:34AM -0700, Eric W. Biederman wrote: > > Neil Horman <nhorman at tuxdriver.com> writes: > > > > Ok. My only remaining nit to pick is that fix_hypertransport_config > > is right in the middle of the nvidia quirks, which can be a bit > > confusing when reading through the code. Otherwise I think this > > is a version that we can merge. > > > Sure, I'll move it to the top of the file > > > Let's get a clean description on this thing and send it to the > > current x86 maintainers. Thomas, Ingo, and HPA > > > > Clean Summary: > > Recently a kdump bug was discovered in which a system would hang inside > calibrate_delay during the booting of the kdump kernel. This was caused by the > fact that the jiffies counter was not being incremented during timer > calibration. The root cause of this problem was found to be a bios > misconfiguration of the hypertransport bus. On system affected by this hang, > the bios had assigned APIC ids which used extended apic bits (more than the > nominal 4 bit ids's), but failed to configure bit 18 of the hypertransport should be bit 17. YH
