Eric Lee / smarc-fsl-linux-kernel

12 Dec, 2012

1 commit

  • 18468d93e   mm: introduce a common interface for balloon pages mobility ... Browse Code ยป

    Memory fragmentation introduced by ballooning might reduce significantly
    the number of 2MB contiguous memory blocks that can be used within a guest,
    thus imposing performance penalties associated with the reduced number of
    transparent huge pages that could be used by the guest workload.

    This patch introduces a common interface to help a balloon driver on
    making its page set movable to compaction, and thus allowing the system
    to better leverage the compation efforts on memory defragmentation.

    [akpm@linux-foundation.org: use PAGE_FLAGS_CHECK_AT_PREP, s/__balloon_page_flags/page_flags_cleared/, small cleanups]
    [rientjes@google.com: allow balloon compaction for any system with memory compaction enabled, which is the defconfig]
    Signed-off-by: Rafael Aquini
    Acked-by: Mel Gorman
    Cc: Rusty Russell
    Cc: "Michael S. Tsirkin"
    Cc: Rik van Riel
    Cc: Andi Kleen
    Cc: Konrad Rzeszutek Wilk
    Cc: Minchan Kim
    Signed-off-by: David Rientjes
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Rafael Aquini