Doug / smarc-fsl-linux-kernel

24 Feb, 2013

1 commit

  • 194159fbc   mm: remove MIGRATE_ISOLATE check in hotpath ... Browse Code »

    Several functions test MIGRATE_ISOLATE and some of those are hotpath but
    MIGRATE_ISOLATE is used only if we enable CONFIG_MEMORY_ISOLATION(ie,
    CMA, memory-hotplug and memory-failure) which are not common config
    option. So let's not add unnecessary overhead and code when we don't
    enable CONFIG_MEMORY_ISOLATION.

    Signed-off-by: Minchan Kim
    Cc: KOSAKI Motohiro
    Acked-by: Michal Nazarewicz
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Minchan Kim
     

12 Dec, 2012

1 commit

  • b023f4681   memory-hotplug: skip HWPoisoned page when offlining pages ... Browse Code »

    hwpoisoned may be set when we offline a page by the sysfs interface
    /sys/devices/system/memory/soft_offline_page or
    /sys/devices/system/memory/hard_offline_page. If we don't clear
    this flag when onlining pages, this page can't be freed, and will
    not in free list. So we can't offline these pages again. So we
    should skip such page when offlining pages.

    Signed-off-by: Wen Congyang
    Cc: David Rientjes
    Cc: Jiang Liu
    Cc: Len Brown
    Cc: Benjamin Herrenschmidt
    Cc: Paul Mackerras
    Cc: Christoph Lameter
    Cc: Minchan Kim
    Cc: KOSAKI Motohiro
    Cc: Yasuaki Ishimatsu
    Cc: Andi Kleen
    Cc: Mel Gorman
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Wen Congyang
     

09 Oct, 2012

2 commits

  • 723a0644a   mm/page_alloc: refactor out __alloc_contig_migrate_alloc() ... Browse Code »

    __alloc_contig_migrate_alloc() can be used by memory-hotplug so refactor
    it out (move + rename as a common name) into page_isolation.c.

    [akpm@linux-foundation.org: checkpatch fixes]
    Signed-off-by: Minchan Kim
    Cc: Kamezawa Hiroyuki
    Reviewed-by: Yasuaki Ishimatsu
    Acked-by: Michal Nazarewicz
    Cc: Marek Szyprowski
    Cc: Wen Congyang
    Acked-by: David Rientjes
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Minchan Kim
     
  • 435b405c0   memory-hotplug: fix pages missed by race rather than failing ... Browse Code »

    If race between allocation and isolation in memory-hotplug offline
    happens, some pages could be in MIGRATE_MOVABLE of free_list although the
    pageblock's migratetype of the page is MIGRATE_ISOLATE.

    The race could be detected by get_freepage_migratetype in
    __test_page_isolated_in_pageblock. If it is detected, now EBUSY gets
    bubbled all the way up and the hotplug operations fails.

    But better idea is instead of returning and failing memory-hotremove, move
    the free page to the correct list at the time it is detected. It could
    enhance memory-hotremove operation success ratio although the race is
    really rare.

    Suggested by Mel Gorman.

    [akpm@linux-foundation.org: small cleanup]
    Signed-off-by: Minchan Kim
    Cc: KAMEZAWA Hiroyuki
    Reviewed-by: Yasuaki Ishimatsu
    Acked-by: Mel Gorman
    Cc: Xishi Qiu
    Cc: Wen Congyang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Minchan Kim
     

01 Aug, 2012

1 commit

  • ee6f509c3   mm: factor out memory isolate functions ... Browse Code »

    mm/page_alloc.c has some memory isolation functions but they are used only
    when we enable CONFIG_{CMA|MEMORY_HOTPLUG|MEMORY_FAILURE}. So let's make
    it configurable by new CONFIG_MEMORY_ISOLATION so that it can reduce
    binary size and we can check it simple by CONFIG_MEMORY_ISOLATION, not if
    defined CONFIG_{CMA|MEMORY_HOTPLUG|MEMORY_FAILURE}.

    Signed-off-by: Minchan Kim
    Cc: Andi Kleen
    Cc: Marek Szyprowski
    Acked-by: KAMEZAWA Hiroyuki
    Cc: KOSAKI Motohiro
    Cc: Mel Gorman
    Cc: Michal Hocko
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Minchan Kim
     

21 May, 2012

1 commit

  • 0815f3d81   mm: page_isolation: MIGRATE_CMA isolation functions added ... Browse Code »

    This commit changes various functions that change pages and
    pageblocks migrate type between MIGRATE_ISOLATE and
    MIGRATE_MOVABLE in such a way as to allow to work with
    MIGRATE_CMA migrate type.

    Signed-off-by: Michal Nazarewicz
    Signed-off-by: Marek Szyprowski
    Reviewed-by: KAMEZAWA Hiroyuki
    Tested-by: Rob Clark
    Tested-by: Ohad Ben-Cohen
    Tested-by: Benjamin Gaignard
    Tested-by: Robert Nelson
    Tested-by: Barry Song

    Michal Nazarewicz
     

17 Oct, 2007

1 commit

  • a5d76b54a   memory unplug: page isolation ... Browse Code »

    Implement generic chunk-of-pages isolation method by using page grouping ops.

    This patch add MIGRATE_ISOLATE to MIGRATE_TYPES. By this
    - MIGRATE_TYPES increases.
    - bitmap for migratetype is enlarged.

    pages of MIGRATE_ISOLATE migratetype will not be allocated even if it is free.
    By this, you can isolated *freed* pages from users. How-to-free pages is not
    a purpose of this patch. You may use reclaim and migrate codes to free pages.

    If start_isolate_page_range(start,end) is called,
    - migratetype of the range turns to be MIGRATE_ISOLATE if
    its type is MIGRATE_MOVABLE. (*) this check can be updated if other
    memory reclaiming works make progress.
    - MIGRATE_ISOLATE is not on migratetype fallback list.
    - All free pages and will-be-freed pages are isolated.
    To check all pages in the range are isolated or not, use test_pages_isolated(),
    To cancel isolation, use undo_isolate_page_range().

    Changes V6 -> V7
    - removed unnecessary #ifdef

    There are HOLES_IN_ZONE handling codes...I'm glad if we can remove them..

    Signed-off-by: Yasunori Goto
    Signed-off-by: KAMEZAWA Hiroyuki
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    KAMEZAWA Hiroyuki