Messages in this thread | | | Date | Fri, 15 Aug 2008 08:16:14 -0400 | From | Aristeu Rozanski <> | Subject | Re: [PATCH] perfctr: don't use CCCR_OVF_PMI1 on Pentium 4Ds |
| |
Hi Ingo, > > Currently, setup_p4_watchdog() use CCCR_OVF_PMI1 to enable the counter > > overflow interrupts to the second logical core. But this bit doesn't > > work on Pentium 4 Ds (model 4, stepping 4) and this patch avoids its > > use on these processors. [...] > > btw., what was the effect - an oops on bootup, or a non-working > watchdog? it just won't work at boot time - the second logic unit will be stuck:
Booting processor 1/2 APIC 0x1 Initializing CPU#1 Calibrating delay using timer specific routine.. 5586.12 BogoMIPS (lpj=2793063) CPU: Trace cache: 12K uops, L1 D cache: 16K CPU: L2 cache: 1024K CPU: Physical Processor ID: 0 CPU: Processor Core ID: 1 CPU1: Thermal monitoring enabled (TM1) Intel(R) Pentium(R) D CPU 2.80GHz stepping 04 Brought up 2 CPUs testing NMI watchdog ... <4>WARNING: CPU#1: NMI appears to be stuck (0->0)!
-- Aristeu
| |