Hello Michael, On Thu, Jan 28, 2016 at 08:16:25AM +0100, Michael Kerrisk (man-pages) wrote: > Hello Minchan, > > On 11/30/2015 07:39 AM, Minchan Kim wrote: > > 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. > > Now that MADV_FREE has been merged, would you be willing to write > patch to the madvise(2) man page that describes the semantics, > noes limitations and restrictions, and (ideally) has some sentences > describing use cases? I will try next week. Thanks for the heads up. > > Thanks, > > Michael > > > > 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(-) > > > > > -- > Michael Kerrisk > Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ > Linux/UNIX System Programming Training: http://man7.org/training/ -- 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>