Messages in this thread | | | Subject | Re: nmi_watchdog=2 regression in 2.6.21 | From | Daniel Walker <> | Date | Wed, 29 Aug 2007 18:21:59 -0700 |
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On Wed, 2007-08-29 at 14:24 -0700, Stephane Eranian wrote:
> Now on Core Duo, there is no PEBS anyway, so it is okay to use counter 0 > for NMI. The problem is that the detection code in perfctr-watchdog.c > treats a Core Duo and a Core 2 Duo the same way as they both have the > X86_FEATURE_ARCH_PERFMON bit set. > > I have attached a patch with handle the case of the Core Duo. Unfortunately, > I do not own one so I cannot test it. I would appreciate if you could > try re-applying my counter 0 -> 1 patch + this new one to see if you > have the problem with the NMI getting stuck.
I tested your patch .. The system doesn't hang, but the NMI seems to disappear .. The check_nmi_watchdog() is not called, and the NMI never actually starts firing .. Is that what you had intended?
Daniel
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