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authorMel Gorman <mel@csn.ul.ie>2010-05-25 01:32:28 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 19:06:59 +0400
commit76ab0f530e4a01d4dc20cdc1d5e87753c579dc18 (patch)
tree8e1566df85e02f67876685c36d217fec4845f79f /include/linux/compaction.h
parent748446bb6b5a9390b546af38ec899c868a9dbcf0 (diff)
downloadlinux-76ab0f530e4a01d4dc20cdc1d5e87753c579dc18.tar.xz
mm: compaction: add /proc trigger for memory compaction
Add a proc file /proc/sys/vm/compact_memory. When an arbitrary value is written to the file, all zones are compacted. The expected user of such a trigger is a job scheduler that prepares the system before the target application runs. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compaction.h')
-rw-r--r--include/linux/compaction.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index 465ca88615ed..572388880ba8 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -6,4 +6,10 @@
#define COMPACT_PARTIAL 1
#define COMPACT_COMPLETE 2
+#ifdef CONFIG_COMPACTION
+extern int sysctl_compact_memory;
+extern int sysctl_compaction_handler(struct ctl_table *table, int write,
+ void __user *buffer, size_t *length, loff_t *ppos);
+#endif /* CONFIG_COMPACTION */
+
#endif /* _LINUX_COMPACTION_H */