From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Pages which are in use as page tables have some space unused in struct page. It would be handy to have a pointer to the struct mm_struct that they belong to so that we can handle uncorrectable errors in page tables more gracefully. There are a few other things we could use it for too, such as checking that the page table entry actually belongs to the task we think it ought to. This patch series does none of that, but does lay the groundwork for it. Matthew Wilcox (Oracle) (7): mm: Document x86 uses a linked list of pgds mm: Move pt_mm within struct page arm: Thread mm_struct throughout page table allocation arm64: Thread mm_struct throughout page table allocation m68k: Thread mm_struct throughout page table allocation mm: Set pt_mm in PTE constructor mm: Set pt_mm in PMD constructor arch/arc/include/asm/pgalloc.h | 2 +- arch/arm/mm/mmu.c | 66 ++++++++--------- arch/arm64/include/asm/pgalloc.h | 2 +- arch/arm64/mm/mmu.c | 93 ++++++++++++------------ arch/m68k/include/asm/mcf_pgalloc.h | 2 +- arch/m68k/include/asm/motorola_pgalloc.h | 10 +-- arch/m68k/mm/motorola.c | 4 +- arch/openrisc/include/asm/pgalloc.h | 2 +- arch/powerpc/mm/book3s64/pgtable.c | 2 +- arch/powerpc/mm/pgtable-frag.c | 2 +- arch/s390/include/asm/pgalloc.h | 2 +- arch/s390/mm/pgalloc.c | 2 +- arch/sparc/mm/init_64.c | 2 +- arch/sparc/mm/srmmu.c | 2 +- arch/x86/include/asm/pgalloc.h | 2 +- arch/x86/mm/pgtable.c | 3 +- arch/xtensa/include/asm/pgalloc.h | 2 +- include/asm-generic/pgalloc.h | 2 +- include/linux/mm.h | 18 ++++- include/linux/mm_types.h | 12 +-- 20 files changed, 122 insertions(+), 110 deletions(-) base-commit: 6a8b55ed4056ea5559ebe4f6a4b247f627870d4c -- 2.26.2
