[PATCH] pacct: avoidance to refer the last thread as a representation of the process
When pacct facility generate an 'ac_flag' field in accounting record, it
refers a task_struct of the thread which died last in the process. But any
other task_structs are ignored.
Therefore, pacct facility drops ASU flag even if root-privilege operations are
used by any other threads except the last one. In addition, AFORK flag is
always set when the thread of group-leader didn't die last, although this
process has called execve() after fork().
We have a same matter in ac_exitcode. The recorded ac_exitcode is an exit
code of the last thread in the process. There is a possibility this exitcode
is not the group leader's one.
diff --git a/include/linux/sched.h b/include/linux/sched.h
index abada7c..d8429dc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -359,6 +359,8 @@
};
struct pacct_struct {
+ int ac_flag;
+ long ac_exitcode;
unsigned long ac_mem;
};