Merge branch 'acpi-misc'

[linux-2.6-microblaze.git] / include / linux / page_counter.h

diff --git a/include/linux/page_counter.h b/include/linux/page_counter.h
index 85bd413..6795913 100644 (file)
--- a/include/linux/page_counter.h
+++ b/include/linux/page_counter.h
@@ -12,7 +12,6 @@ struct page_counter {
        unsigned long low;
        unsigned long high;
        unsigned long max;
-       struct page_counter *parent;
 
        /* effective memory.min and memory.min usage tracking */
        unsigned long emin;
@@ -27,6 +26,14 @@ struct page_counter {
        /* legacy */
        unsigned long watermark;
        unsigned long failcnt;
+
+       /*
+        * 'parent' is placed here to be far from 'usage' to reduce
+        * cache false sharing, as 'usage' is written mostly while
+        * parent is frequently read for cgroup's hierarchical
+        * counting nature.
+        */
+       struct page_counter *parent;
 };
 
 #if BITS_PER_LONG == 32