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setrunnable: adjust to slightly different locking strategy post yamt-idlewlp. 

Should fix kern/36398. Untested due to connectivity issues.
This commit is contained in:
ad 2007-05-31 22:06:09 +00:00
parent be230fb632
commit 057666ad0c
1 changed files with 7 additions and 6 deletions
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13
sys/kern/kern_synch.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_synch.c,v 1.188 2007/05/17 14:51:40 yamt Exp $ */
/* $NetBSD: kern_synch.c,v 1.189 2007/05/31 22:06:09 ad Exp $ */
/*-
* Copyright (c) 1999, 2000, 2004, 2006, 2007 The NetBSD Foundation, Inc.
@ -75,7 +75,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.188 2007/05/17 14:51:40 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.189 2007/05/31 22:06:09 ad Exp $");
#include "opt_kstack.h"
#include "opt_lockdebug.h"
@ -556,8 +556,6 @@ setrunnable(struct lwp *l)
return;
}
KASSERT(lwp_locked(l, &l->l_cpu->ci_schedstate.spc_lwplock));
/*
* If the LWP is still on the CPU, mark it as LSONPROC. It may be
* about to call mi_switch(), in which case it will yield.
@ -573,8 +571,11 @@ setrunnable(struct lwp *l)
* Set the LWP runnable. If it's swapped out, we need to wake the swapper
* to bring it back in. Otherwise, enter it into a run queue.
*/
spc_lock(l->l_cpu);
lwp_unlock_to(l, l->l_cpu->ci_schedstate.spc_mutex);
if (l->l_mutex != l->l_cpu->ci_schedstate.spc_mutex) {
spc_lock(l->l_cpu);
lwp_unlock_to(l, l->l_cpu->ci_schedstate.spc_mutex);
}
sched_setrunnable(l);
l->l_stat = LSRUN;
l->l_slptime = 0;