>> On Friday 04 May 2007 23:29:04 john stultz wrote:
>>> One of the 2.6.21 regressions was Guilherme's problem seeing his box
>>> lock up when the system detected an unstable TSC and dropped back to
>>> using the HPET.
>>>
>>> In digging deeper, we found the HPET is not actually incrementing on
>>> this system. And in fact, the reason why this issue just cropped up was
>>> because of Thomas's clocksource watchdog code was comparing the TSC to
>>> the HPET (which wasn't moving) and thought the TSC was broken.
>>>
>>> Anyway, Guliherme checked for a BIOS update and did not find one, so
>>> I've added a DMI blacklist against his system so the HPET is not used.
>>>
>>> Many thanks to Guilherme for the slow and laborious testing that finally
>>> narrowed down this issue.
>> Before going to hard to maintain DMI black lists we should first check
>> if it's a more general problem and can't it be solved better? Most likely
>> that system isn't the one with this issue and I don't want to apply
>> DMI patches forever.