• Rafael Aquini's avatar
    mm: introduce compaction and migration for ballooned pages · bf6bddf1
    Rafael Aquini authored
    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 the helper functions as well as the necessary changes
    to teach compaction and migration bits how to cope with pages which are
    part of a guest memory balloon, in order to make them movable by memory
    compaction procedures.
    Signed-off-by: default avatarRafael Aquini <aquini@redhat.com>
    Acked-by: default avatarMel Gorman <mel@csn.ul.ie>
    Cc: Rusty Russell <rusty@rustcorp.com.au>
    Cc: "Michael S. Tsirkin" <mst@redhat.com>
    Cc: Rik van Riel <riel@redhat.com>
    Cc: Andi Kleen <andi@firstfloor.org>
    Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    Cc: Minchan Kim <minchan@kernel.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    bf6bddf1
compaction.c 33.9 KB