Re: [Devel] [PATCH rh7 v2] x86/mm: Use dirty bit for non-linear files ptes

2016-10-03 Thread Andrey Ryabinin
On 10/03/2016 11:56 AM, Andrey Ryabinin wrote: > Backported patchset "Workaround for Xeon Phi PTE A/D bits erratum" > caused - kernel BUG at mm/rmap.c:1305! > > _PAGE_BIT_FILE is not present in upstream but still present > in RHEL7 kernel, so they did this: >/* Pick a bit unaffected by the

[Devel] [PATCH rh7 v2] x86/mm: Use dirty bit for non-linear files ptes

2016-10-03 Thread Andrey Ryabinin
Backported patchset "Workaround for Xeon Phi PTE A/D bits erratum" caused - kernel BUG at mm/rmap.c:1305! _PAGE_BIT_FILE is not present in upstream but still present in RHEL7 kernel, so they did this: /* Pick a bit unaffected by the "KNL4 erratum": */ #define _PAGE_BIT_FILE