The current rusage code show peculiar problems:

- Unsafeness on ruadd() in thread_exit()
- Unatomicity of thread_exiit() in the exit1() operations

This patch addresses these problems allocating p_fd as part of the
process and modifying the way it is accessed.

A small chunk of this patch, resolves a race about p_state in kern_wait(),
since we have to be sure about the zombif-ing process.

Submitted by: jeff
Approved by: jeff (mentor)

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index ac00de0..54d78e6 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -500,6 +500,7 @@ proc0_post(void *dummy __unused)
 {
 	struct timespec ts;
 	struct proc *p;
+	struct rusage ru;
 
 	/*
 	 * Now we can look at the time, having had a chance to verify the
@@ -508,7 +509,11 @@ proc0_post(void *dummy __unused)
 	sx_slock(&allproc_lock);
 	FOREACH_PROC_IN_SYSTEM(p) {
 		microuptime(&p->p_stats->p_start);
+		rufetch(p, &ru);	/* Clears thread stats */
 		p->p_rux.rux_runtime = 0;
+		p->p_rux.rux_uticks = 0;
+		p->p_rux.rux_sticks = 0;
+		p->p_rux.rux_iticks = 0;
 	}
 	sx_sunlock(&allproc_lock);
 	PCPU_SET(switchtime, cpu_ticks());