From: Rusty Russell <rusty@rustcorp.com.au>
To: "BALBIR SINGH" <balbir.singh@wipro.com>
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Hotplug CPU prep III: daemonize idle tasks
Date: Mon, 13 May 2002 12:01:04 +1000 [thread overview]
Message-ID: <E177597-0001TA-00@wagner.rustcorp.com.au> (raw)
In-Reply-To: Your message of "Thu, 09 May 2002 17:36:43 +0530." <AAEGIMDAKGCBHLBAACGBAELNCHAA.balbir.singh@wipro.com>
In message <AAEGIMDAKGCBHLBAACGBAELNCHAA.balbir.singh@wipro.com> you write:
> I tried a version of __daemonize in 2.4. It panics in
> schedule()
>
> prepare_to_switch();
> {
> struct mm_struct *mm = next->mm;
> struct mm_struct *oldmm = prev->active_mm;
> if (!mm) {
> if (next->active_mm) BUG();
>
> I got hit by the BUG() in 2.4, I think prepare_to_switch has
> moved to specific archs in 2.5. A quick look showed that
> this issue no longer exists in 2.5.
Uhhh... there are many other problems if you are trying to do this on
a "live" process. idle process creation is a special case because it
has never been run yet.
This is not a generic "daemonize this task" mechanism!
Rusty.
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
next prev parent reply other threads:[~2002-05-13 1:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-09 8:50 Rusty Russell
2002-05-09 12:06 ` BALBIR SINGH
2002-05-13 2:01 ` Rusty Russell [this message]
2002-05-13 6:19 ` BALBIR SINGH
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