In v4, Andrew wanted to settle in old basic MADV_FREE and introduces new stuffs(ie, lazyfree LRU, swapless support and lazyfreeness) later so this version doesn't include them. I have been tested it on mmotm-2015-11-25-17-08 with additional patch[1] from Kirill to prevent BUG_ON which he didn't send to linux-mm yet as formal patch. With it, I couldn't find any problem so far. Note that this version is based on THP refcount redesign so I needed some modification on MADV_FREE because split_huge_pmd doesn't split a THP page any more and pmd_trans_huge(pmd) is not enough to guarantee the page is not THP page. As well, for MAVD_FREE lazy-split, THP split should respect pmd's dirtiness rather than marking ptes of all subpages dirty unconditionally. Please, review last patch in this patchset. mm: don't split THP page when syscall is called [1] https://lkml.org/lkml/2015/11/17/134 git: git://git.kernel.org/pub/scm/linux/kernel/git/minchan/linux.git branch: mm/madv_free-v4.4-rc2-mmotm-2015-11-25-17-08-v5r2 In this stage, I don't think we need to write man page. It could be done after solid policy and implementation. * Change from v4 * drop lazyfree LRU * drop swapless support * drop lazyfreeness * rebase on recent mmotom with THP refcount redesign * Change from v3 * some bug fix * code refactoring * lazyfree reclaim logic change * reordering patch * Change from v2 * vm_lazyfreeness tuning knob * add new LRU list - Johannes, Shaohua * support swapless - Johannes * Change from v1 * Don't do unnecessary TLB flush - Shaohua * Added Acked-by - Hugh, Michal * Merge deactivate_page and deactivate_file_page * Add pmd_dirty/pmd_mkclean patches for several arches * Add lazy THP split patch * Drop zhangyanfei@xxxxxxxxxxxxxx - Delivery Failure Chen Gang (1): arch: uapi: asm: mman.h: Let MADV_FREE have same value for all architectures Minchan Kim (11): mm: support madvise(MADV_FREE) mm: define MADV_FREE for some arches mm: free swp_entry in madvise_free mm: move lazily freed pages to inactive list mm: mark stable page dirty in KSM x86: add pmd_[dirty|mkclean] for THP sparc: add pmd_[dirty|mkclean] for THP powerpc: add pmd_[dirty|mkclean] for THP arm: add pmd_mkclean for THP arm64: add pmd_mkclean for THP mm: don't split THP page when syscall is called arch/alpha/include/uapi/asm/mman.h | 2 + arch/arm/include/asm/pgtable-3level.h | 1 + arch/arm64/include/asm/pgtable.h | 1 + arch/mips/include/uapi/asm/mman.h | 2 + arch/parisc/include/uapi/asm/mman.h | 2 + arch/powerpc/include/asm/pgtable-ppc64.h | 2 + arch/sparc/include/asm/pgtable_64.h | 9 ++ arch/x86/include/asm/pgtable.h | 5 + arch/xtensa/include/uapi/asm/mman.h | 2 + include/linux/huge_mm.h | 3 + include/linux/rmap.h | 1 + include/linux/swap.h | 1 + include/linux/vm_event_item.h | 1 + include/uapi/asm-generic/mman-common.h | 1 + mm/huge_memory.c | 87 +++++++++++++- mm/ksm.c | 6 + mm/madvise.c | 199 +++++++++++++++++++++++++++++++ mm/rmap.c | 8 ++ mm/swap.c | 44 +++++++ mm/swap_state.c | 5 +- mm/vmscan.c | 10 +- mm/vmstat.c | 1 + 22 files changed, 383 insertions(+), 10 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
