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-rw-r--r--sys/src/9/port/alarm.c2
-rw-r--r--sys/src/9/port/portclock.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/sys/src/9/port/alarm.c b/sys/src/9/port/alarm.c
index fb607523b..d500a68e4 100644
--- a/sys/src/9/port/alarm.c
+++ b/sys/src/9/port/alarm.c
@@ -37,7 +37,7 @@ alarmkproc(void*)
}
/*
- * called every clock tick
+ * called every clock tick on cpu0
*/
void
checkalarms(void)
diff --git a/sys/src/9/port/portclock.c b/sys/src/9/port/portclock.c
index 3f7d4be7c..8f56b50c1 100644
--- a/sys/src/9/port/portclock.c
+++ b/sys/src/9/port/portclock.c
@@ -153,7 +153,8 @@ hzclock(Ureg *ur)
exit(0);
}
- checkalarms();
+ if(m->machno == 0)
+ checkalarms();
if(up && up->state == Running)
hzsched(); /* in proc.c */