If a thread wake up spuriously, re-set l_mutex to make sure it's
still at the original value and not the schedstate one. This makes select not miss wakeups in cases where there was a lot of selecting going on (which is not all that common in a rump kernel).
This commit is contained in:
parent
4127064077
commit
8b9126ba6d
@ -1,4 +1,4 @@
|
||||
/* $NetBSD: sleepq.c,v 1.7 2010/07/22 21:00:07 pooka Exp $ */
|
||||
/* $NetBSD: sleepq.c,v 1.8 2010/07/23 19:14:14 pooka Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2008 Antti Kantee. All Rights Reserved.
|
||||
@ -26,7 +26,7 @@
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.7 2010/07/22 21:00:07 pooka Exp $");
|
||||
__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.8 2010/07/23 19:14:14 pooka Exp $");
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/condvar.h>
|
||||
@ -85,6 +85,7 @@ sleepq_block(int timo, bool catch)
|
||||
int biglocks = l->l_biglocks;
|
||||
|
||||
while (l->l_wchan) {
|
||||
l->l_mutex = mp;
|
||||
if ((error=cv_timedwait(&sq_cv, mp, timo)) == EWOULDBLOCK) {
|
||||
TAILQ_REMOVE(l->l_sleepq, l, l_sleepchain);
|
||||
l->l_wchan = NULL;
|
||||
|
Loading…
Reference in New Issue
Block a user