• Rafael Aquini's avatar
    mm: introduce a common interface for balloon pages mobility · 18468d93
    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 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: 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 avatarDavid Rientjes <rientjes@google.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Makefile 1.96 KB