This patch enable MADV_FREE hint for madvise syscall, which have been supported by other OSes. [PATCH 1] includes the details. [1] support MADVISE_FREE for !THP page so if VM encounter THP page in syscall context, it splits THP page. [2-7] is to preparing to call madvise syscall without THP plitting [8] enable THP page support for MADV_FREE. * From v11 * Fix arm build - Steve * Separate patch for arm and arm64 - Steve * Remove unnecessary check - Kirill * Skip non-vm_normal page - Kirill * Add Acked-by - Zhang * Sparc64 build fix * Pagetable walker THP handling fix * From v10 * Add Acked-by from arch stuff(x86, s390) * Pagewalker based pagetable working - Kirill * Fix try_to_unmap_one broken with hwpoison - Kirill * Use VM_BUG_ON_PAGE in madvise_free_pmd - Kirill * Fix pgtable-3level.h for arm - Steve * From v9 * Add Acked-by - Rik * Add THP page support - Kirill * From v8 * Rebased-on v3.16-rc2-mmotm-2014-06-25-16-44 * From v7 * Rebased-on next-20140613 * From v6 * Remove page from swapcache in syscal time * Move utility functions from memory.c to madvise.c - Johannes * Rename untilify functtions - Johannes * Remove unnecessary checks from vmscan.c - Johannes * Rebased-on v3.15-rc5-mmotm-2014-05-16-16-56 * Drop Reviewe-by because there was some changes since then. * From v5 * Fix PPC problem which don't flush TLB - Rik * Remove unnecessary lazyfree_range stub function - Rik * Rebased on v3.15-rc5 * From v4 * Add Reviewed-by: Zhang Yanfei * Rebase on v3.15-rc1-mmotm-2014-04-15-16-14 * From v3 * Add "how to work part" in description - Zhang * Add page_discardable utility function - Zhang * Clean up * From v2 * Remove forceful dirty marking of swap-readed page - Johannes * Remove deactivation logic of lazyfreed page * Rebased on 3.14 * Remove RFC tag * From v1 * Use custom page table walker for madvise_free - Johannes * Remove PG_lazypage flag - Johannes * Do madvise_dontneed instead of madvise_freein swapless system Minchan Kim (8): [1] mm: support madvise(MADV_FREE) [2] x86: add pmd_[dirty|mkclean] for THP [3] sparc: add pmd_[dirty|mkclean] for THP [4] powerpc: add pmd_[dirty|mkclean] for THP [5] s390: add pmd_[dirty|mkclean] for THP [6] arm: add pmd_[dirty|mkclean] for THP [7] arm64: add pmd_[dirty|mkclean] for THP [8] mm: Don't split THP page when syscall is called arch/arm/include/asm/pgtable-3level.h | 3 + arch/arm64/include/asm/pgtable.h | 2 + arch/powerpc/include/asm/pgtable-ppc64.h | 2 + arch/s390/include/asm/pgtable.h | 12 +++ arch/sparc/include/asm/pgtable_64.h | 16 ++++ arch/x86/include/asm/pgtable.h | 10 ++ include/linux/huge_mm.h | 4 + include/linux/rmap.h | 9 +- include/linux/vm_event_item.h | 1 + include/uapi/asm-generic/mman-common.h | 1 + mm/huge_memory.c | 35 +++++++ mm/madvise.c | 155 +++++++++++++++++++++++++++++++ mm/rmap.c | 46 ++++++++- mm/vmscan.c | 64 +++++++++---- mm/vmstat.c | 1 + 15 files changed, 341 insertions(+), 20 deletions(-) -- 2.0.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>