Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 9 Mar 2017 10:15:22 -0800 | Subject | Re: [net/bpf] 3051bf36c2 BUG: unable to handle kernel paging request at 0000a7cf |
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On Thu, Mar 9, 2017 at 10:10 AM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > > Very odd. We should always have PGE (0x0080) set in cr4 (if the CPU > supports it).
Daniel, do you see the code in probe_page_size_mask() triggering?
/* Enable PGE if available */ if (boot_cpu_has(X86_FEATURE_PGE)) { cr4_set_bits_and_update_boot(X86_CR4_PGE); __supported_pte_mask |= _PAGE_GLOBAL; } else __supported_pte_mask &= ~_PAGE_GLOBAL;
but maybe there's something wrong with the percpu cr4 caching?
Linus
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