2.6.26-rc1

 kernel

diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index efbfc0f..d3c61b4 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/parser.h>
 #include <linux/fs.h>
+#include <linux/slab.h>
 #include <linux/res_counter.h>
 #include <linux/uaccess.h>
 
@@ -27,6 +28,8 @@ int res_counter_charge_locked(struct res_counter *counter, unsigned long val)
    }
 
    counter->usage += val;
+   if (counter->usage > counter->max_usage)
+      counter->max_usage = counter->usage;
    return 0;
 }
 
@@ -65,6 +68,8 @@ res_counter_member(struct res_counter *counter, int member)
    switch (member) {
    case RES_USAGE:
       return &counter->usage;
+   case RES_MAX_USAGE:
+      return &counter->max_usage;
    case RES_LIMIT:
       return &counter->limit;
    case RES_FAILCNT:
@@ -92,6 +97,11 @@ ssize_t res_counter_read(struct res_counter *counter, int member,
          pos, buf, s - buf);
 }
 
+u64 res_counter_read_u64(struct res_counter *counter, int member)
+{
+   return *res_counter_member(counter, member);
+}
+
 ssize_t res_counter_write(struct res_counter *counter, int member,
       const char __user *userbuf, size_t nbytes, loff_t *pos,
       int (*write_strategy)(char *st_buf, unsigned long long *val))