Messages in this thread | | | Date | Sat, 2 Aug 2008 11:16:35 -0700 (PDT) | From | Chris Rankin <> | Subject | Enabling PAT in 2.6.26.x |
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Hi,
I see that the PAT support in 2.6.26.x depends on the CPUID information, and that it is currently disabled for some older model Pentium IIIs:
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 7 model name : Pentium III (Katmai) stepping : 3 cpu MHz : 498.862 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 998.80 clflush size : 32
I suppose that I could hack the kernel to allow PAT to be enabled for this model CPU, but I'm not sure how meaningful the results would be. Does PAT support either work immediately or not at all? Or are any errors likely to be more subtle?
Basically, is there any reliable way of confirming whether PAT can be enabled for the CPU, please?
Thanks, Chris
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