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-rw-r--r--kernel/tsacct.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/tsacct.c b/kernel/tsacct.c
index 410483490cf6..47c71daa416f 100644
--- a/kernel/tsacct.c
+++ b/kernel/tsacct.c
@@ -88,4 +88,34 @@ void xacct_add_tsk(struct taskstats *stats, struct task_struct *p)
stats->read_syscalls = p->syscr;
stats->write_syscalls = p->syscw;
}
+
+
+/**
+ * acct_update_integrals - update mm integral fields in task_struct
+ * @tsk: task_struct for accounting
+ */
+void acct_update_integrals(struct task_struct *tsk)
+{
+ if (likely(tsk->mm)) {
+ long delta =
+ cputime_to_jiffies(tsk->stime) - tsk->acct_stimexpd;
+
+ if (delta == 0)
+ return;
+ tsk->acct_stimexpd = tsk->stime;
+ tsk->acct_rss_mem1 += delta * get_mm_rss(tsk->mm);
+ tsk->acct_vm_mem1 += delta * tsk->mm->total_vm;
+ }
+}
+
+/**
+ * acct_clear_integrals - clear the mm integral fields in task_struct
+ * @tsk: task_struct whose accounting fields are cleared
+ */
+void acct_clear_integrals(struct task_struct *tsk)
+{
+ tsk->acct_stimexpd = 0;
+ tsk->acct_rss_mem1 = 0;
+ tsk->acct_vm_mem1 = 0;
+}
#endif