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authorDavid Rientjes <rientjes@google.com>2014-06-04 16:08:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-04 16:54:06 -0700
commite0b9daeb453e602a95ea43853dc12d385558ce1f (patch)
treefebaa53d23065ef97ab8608ca4e9ec9c47e36f2c /mm/internal.h
parent35979ef3393110ff3c12c6b94552208d3bdf1a36 (diff)
downloadop-kernel-dev-e0b9daeb453e602a95ea43853dc12d385558ce1f.zip
op-kernel-dev-e0b9daeb453e602a95ea43853dc12d385558ce1f.tar.gz
mm, compaction: embed migration mode in compact_control
We're going to want to manipulate the migration mode for compaction in the page allocator, and currently compact_control's sync field is only a bool. Currently, we only do MIGRATE_ASYNC or MIGRATE_SYNC_LIGHT compaction depending on the value of this bool. Convert the bool to enum migrate_mode and pass the migration mode in directly. Later, we'll want to avoid MIGRATE_SYNC_LIGHT for thp allocations in the pagefault patch to avoid unnecessary latency. This also alters compaction triggered from sysfs, either for the entire system or for a node, to force MIGRATE_SYNC. [akpm@linux-foundation.org: fix build] [iamjoonsoo.kim@lge.com: use MIGRATE_SYNC in alloc_contig_range()] Signed-off-by: David Rientjes <rientjes@google.com> Suggested-by: Mel Gorman <mgorman@suse.de> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 6ee580d..a25424a 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -134,7 +134,7 @@ struct compact_control {
unsigned long nr_migratepages; /* Number of pages to migrate */
unsigned long free_pfn; /* isolate_freepages search base */
unsigned long migrate_pfn; /* isolate_migratepages search base */
- bool sync; /* Synchronous migration */
+ enum migrate_mode mode; /* Async or sync migration mode */
bool ignore_skip_hint; /* Scan blocks even if marked skip */
bool finished_update_free; /* True when the zone cached pfns are
* no longer being updated
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