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authorRafael Aquini <aquini@redhat.com>2012-12-11 16:02:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-11 17:22:27 -0800
commitbf6bddf1924eaebf2beb85e4249a89dd16d4eed6 (patch)
treee03b66a6779727a44f40c4e8f43a06c52d39a6ef /drivers/virtio
parent18468d93e53b037e1a04ec58398eab763d054064 (diff)
downloadlinux-bf6bddf1924eaebf2beb85e4249a89dd16d4eed6.tar.bz2
mm: introduce compaction and migration for ballooned pages
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: Rafael Aquini <aquini@redhat.com> Acked-by: Mel 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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