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| author | Rafael Aquini | 2012-12-12 01:02:38 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2012-12-12 02:22:26 +0100 |
| commit | 18468d93e53b037e1a04ec58398eab763d054064 (patch) | |
| tree | 74392b876400391567f55bb5292107b65e3791a2 /mm/migrate.c | |
| parent | mm: redefine address_space.assoc_mapping (diff) | |
| download | kernel-qcow2-linux-18468d93e53b037e1a04ec58398eab763d054064.tar.gz kernel-qcow2-linux-18468d93e53b037e1a04ec58398eab763d054064.tar.xz kernel-qcow2-linux-18468d93e53b037e1a04ec58398eab763d054064.zip | |
mm: introduce a common interface for balloon pages mobility
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 <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: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
0 files changed, 0 insertions, 0 deletions