document-interaction-between-compaction-and-the-unevictable-lru-fix

identify /proc/sys/vm/compact_unevictable directly

Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Eric B Munson <emunson@akamai.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/vm/unevictable-lru.txt b/Documentation/vm/unevictable-lru.txt
index 018be35c34608d62636ddc306cd4e91aa4742b62..3be0bfc4738df5f7c00ed5aa6d722a8f23a0949f 100644 (file)
--- a/Documentation/vm/unevictable-lru.txt
+++ b/Documentation/vm/unevictable-lru.txt
@@ -455,10 +455,11 @@ COMPACTING MLOCKED PAGES
 ------------------------
 
 The unevictable LRU can be scanned for compactable regions and the default
-behavior is to do so.  There is a sysctl to control this behavior (see
-Documentation/sysctl/vm.txt).  Once scanning of the unevictable LRU is
-enabled, the work of compaction is mostly handled by the page migration code
-and the same work flow as described in MIGRATING MLOCKED PAGES will apply.
+behavior is to do so.  /proc/sys/vm/compact_unevictable_allowed controls
+this behavior (see Documentation/sysctl/vm.txt).  Once scanning of the
+unevictable LRU is enabled, the work of compaction is mostly handled by
+the page migration code and the same work flow as described in MIGRATING
+MLOCKED PAGES will apply.
 
 
 mmap(MAP_LOCKED) SYSTEM CALL HANDLING