Pentium M is PAE capable but does not indicate so in the CPUID response. This is an issue now that some distributions are no longer shipping non-PAE kernels (those distributions no longer boot on Pentium M). This small patch fixes the issue by forcing the PAE capability on Pentium M.
For more discussion see https://bugs.launchpad.net/baltix/+bug/930447 Signed-off-by: Chris Bainbridge <chris.bainbri...@gmail.com> --- diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index bbe1b8b..97996aa 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -226,6 +226,12 @@ static void intel_workarounds(struct cpuinfo_x86 *c) clear_cpu_cap(c, X86_FEATURE_SEP); /* + * PAE CPUID bug: Pentium M reports no PAE but has PAE + */ + if ((c->x86 == 6) && ((c->x86_model == 9) || (c->x86_model == 13))) + set_cpu_cap(c, X86_FEATURE_PAE); + + /* * P4 Xeon errata 037 workaround. * Hardware prefetcher may cause stale data to be loaded into the cache. */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
