[PATCH v11 0/7] MADV_FREE support

Minchan Kim
2014-07-08T06:03:46Z

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.
[2-6] is to preparing to call madvise syscall without THP plitting
[7] enable THP page support for MADV_FREE.

* 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
* Rebased-on v3.16-rc3-mmotm-2014-07-02-15-07

* 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 (7):
[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] 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/rmap.h | 9 +-
include/linux/vm_event_item.h | 1 +
include/uapi/asm-generic/mman-common.h | 1 +
mm/madvise.c | 153 +++++++++++++++++++++++++++++++
mm/rmap.c | 41 ++++++++-
mm/vmscan.c | 64 +++++++++----
mm/vmstat.c | 1 +
13 files changed, 295 insertions(+), 20 deletions(-)

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2.0.0