[PATCH] Zone reclaim: Reclaim logic

[mirror_ubuntu-zesty-kernel.git] / include / linux / mmzone.h

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 34cbefd2ebded8437ab2cb82d6613264593df9a5..93a849f742dbbb47ae5ee00464f328b757d597fe 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -149,14 +149,16 @@ struct zone {
        unsigned long           pages_scanned;     /* since last reclaim */
        int                     all_unreclaimable; /* All pages pinned */
 
-       /*
-        * Does the allocator try to reclaim pages from the zone as soon
-        * as it fails a watermark_ok() in __alloc_pages?
-        */
-       int                     reclaim_pages;
        /* A count of how many reclaimers are scanning this zone */
        atomic_t                reclaim_in_progress;
 
+       /*
+        * timestamp (in jiffies) of the last zone reclaim that did not
+        * result in freeing of pages. This is used to avoid repeated scans
+        * if all memory in the zone is in use.
+        */
+       unsigned long           last_unsuccessful_zone_reclaim;
+
        /*
         * prev_priority holds the scanning priority for this zone.  It is
         * defined as the scanning priority at which we achieved our reclaim