From 0802d56a9be156ab7228074cbf4da73c149fb911 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Mon, 17 Oct 2022 04:10:01 -0400
Subject: x
---
kernel/proc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/proc.c b/kernel/proc.c
index 809d112..58a8a0b 100644
--- a/kernel/proc.c
+++ b/kernel/proc.c
@@ -450,7 +450,8 @@ scheduler(void)
c->proc = 0;
for(;;){
// The most recent process to run may have had interrupts
- // turned off; turn them on to avoid deadlock.
+ // turned off; enable them to avoid a deadlock if all
+ // processes are waiting.
intr_on();
for(p = proc; p < &proc[NPROC]; p++) {
--
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