per-task-delay-accounting: add memory reclaim delay
[linux-2.6.git] / mm / vmscan.c
index 967d30c..26672c6 100644 (file)
@@ -38,6 +38,7 @@
 #include <linux/kthread.h>
 #include <linux/freezer.h>
 #include <linux/memcontrol.h>
+#include <linux/delayacct.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -1316,6 +1317,8 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
        struct zone *zone;
        enum zone_type high_zoneidx = gfp_zone(sc->gfp_mask);
 
+       delayacct_freepages_start();
+
        if (scan_global_lru(sc))
                count_vm_event(ALLOCSTALL);
        /*
@@ -1396,6 +1399,8 @@ out:
        } else
                mem_cgroup_record_reclaim_priority(sc->mem_cgroup, priority);
 
+       delayacct_freepages_end();
+
        return ret;
 }