From: Andi Kleen <ak@suse.de>
To: Hannes Reinecke <Hannes.Reinecke@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Dumb question: BKL on reboot ?
Date: 20 Aug 2003 12:49:47 +0200 [thread overview]
Message-ID: <p73wud861tg.fsf@oldwotan.suse.de> (raw)
In-Reply-To: <3F434BD1.9050704@suse.de.suse.lists.linux.kernel>
Hannes Reinecke <Hannes.Reinecke@suse.de> writes:
> I've got a dumb question: Why is the BKL held on entering sys_reboot()
> in kernel/sys.c:405 ?
Interesting. I have a few SMP deadlocks on x86-64 in reboot too
and it's possible that it is the same problem.
I would hold it during exection of the notifiers, but drop
it before calling into machine_*
-Andi
--- linux-2.6.0test3-amd64/kernel/sys.c-o 2003-07-28 19:18:18.000000000 +0200
+++ linux-2.6.0test3-amd64/kernel/sys.c 2003-08-20 12:48:59.000000000 +0200
@@ -409,6 +409,7 @@
system_running = 0;
device_shutdown();
printk(KERN_EMERG "Restarting system.\n");
+ unlock_kernel();
machine_restart(NULL);
break;
@@ -425,8 +426,8 @@
system_running = 0;
device_shutdown();
printk(KERN_EMERG "System halted.\n");
- machine_halt();
unlock_kernel();
+ machine_halt();
do_exit(0);
break;
@@ -435,8 +436,8 @@
system_running = 0;
device_shutdown();
printk(KERN_EMERG "Power down.\n");
- machine_power_off();
unlock_kernel();
+ machine_power_off();
do_exit(0);
break;
@@ -451,6 +452,7 @@
system_running = 0;
device_shutdown();
printk(KERN_EMERG "Restarting system with command '%s'.\n", buffer);
+ unlock_kernel();
machine_restart(buffer);
break;
next parent reply other threads:[~2003-08-20 10:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3F434BD1.9050704@suse.de.suse.lists.linux.kernel>
2003-08-20 10:49 ` Andi Kleen [this message]
2003-08-20 11:51 ` Dumb question: BKL on reboot ? Hannes Reinecke
2003-08-20 12:03 ` Andi Kleen
2003-08-20 10:22 Hannes Reinecke
2003-08-20 18:29 ` Andrew Morton
2003-08-20 18:35 ` David S. Miller
2003-08-20 20:23 ` Dave Hansen
2003-08-21 8:05 ` Hannes Reinecke
2003-08-21 15:41 ` Andrea Arcangeli
2003-08-21 15:55 ` Hannes Reinecke
2003-08-21 16:39 ` Andrea Arcangeli
2003-08-21 16:58 ` Andrea Arcangeli
2003-08-22 6:39 ` Hannes Reinecke
2003-08-22 13:57 ` Andrea Arcangeli
2003-08-24 21:43 ` Andrea Arcangeli
2003-08-21 15:33 ` Andrea Arcangeli
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