From: Robert Love <rml@tech9.net>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Dave Hansen <haveblue@us.ibm.com>,
"Adam J. Richter" <adam@yggdrasil.com>,
linux-kernel@vger.kernel.org
Subject: Re: Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time
Date: 04 Apr 2002 14:16:35 -0500 [thread overview]
Message-ID: <1017947795.22303.516.camel@phantasy> (raw)
In-Reply-To: <Pine.LNX.4.33.0204041108040.12895-100000@penguin.transmeta.com>
On Thu, 2002-04-04 at 14:13, Linus Torvalds wrote:
> I think the real fix is to make sure that preemption never hits while
> current->state == TASK_ZOMBIE.
>
> In other words, I think the _correct_ fix is to just make
> preempt_schedule() check for something like
>
> if (current->state != TASK_RUNNING)
> return;
>
> and just getting rid of the current "unconditionally set state to
> running".
>
> (Side note: if the state isn't running, we're most likely going to
> reschedule in a controlled manner soon anyway. Sure, there are some loops
> which set state to non-runnable early for race avoidance, but is it a
> _problem_?)
Eh, maybe - what about all the code that sets non-running before putting
itself on a wait queue?
Robert Love
next prev parent reply other threads:[~2002-04-04 19:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-04 11:59 Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time Adam J. Richter
2002-04-04 12:56 ` Stelian Pop
2002-04-04 13:40 ` Alessandro Suardi
2002-04-04 16:23 ` David C. Hansen
2002-04-04 18:28 ` Dave Hansen
2002-04-04 18:51 ` Robert Love
2002-04-04 19:14 ` Linus Torvalds
2002-04-04 19:26 ` Robert Love
2002-04-04 19:41 ` Dave Hansen
2002-04-04 20:02 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() atboot time george anzinger
2002-04-04 20:54 ` Andrew Morton
2002-04-04 21:34 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time Roger Larsson
2002-04-04 22:38 ` Andrew Morton
2002-04-04 22:42 ` Linus Torvalds
2002-04-04 22:54 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() atboot time Andrew Morton
2002-04-04 23:07 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time Robert Love
2002-04-04 23:42 ` Linus Torvalds
2002-04-04 23:47 ` Robert Love
2002-04-04 23:55 ` Linus Torvalds
2002-04-05 0:03 ` [PATCH] preemptive kernel behavior change: don't be rude Robert Love
2002-04-05 1:51 ` george anzinger
2002-04-05 2:06 ` Robert Love
2002-04-04 22:55 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time Robert Love
2002-04-04 23:10 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() atboot time Andrew Morton
2002-04-04 23:16 ` Robert Love
2002-04-04 19:13 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() at boot time Linus Torvalds
2002-04-04 19:16 ` Robert Love [this message]
2002-04-04 19:45 ` Linus Torvalds
2002-04-04 20:09 ` Patch: linux-2.5.8-pre1/kernel/exit.c change caused BUG() atboot time george anzinger
2002-04-04 19:48 ` george anzinger
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