From: Ingo Molnar <mingo@elte.hu>
To: Dipankar Sarma <dipankar@in.ibm.com>
Cc: linux-kernel@vger.kernel.org,
Ananth N Mavinakayanahalli <ananth@in.ibm.com>,
Prasanna Panchamukhi <prasanna@in.ibm.com>
Subject: Re: [PATCH] 2.6.17-rt1 : fix x86_64 oops
Date: Wed, 28 Jun 2006 21:32:56 +0200 [thread overview]
Message-ID: <20060628193256.GA4392@elte.hu> (raw)
In-Reply-To: <20060628182137.GA23979@in.ibm.com>
* Dipankar Sarma <dipankar@in.ibm.com> wrote:
> Turns out that kprobe_flush_task() is called from finish_task_switch()
> with preemption disabled and it uses a converted spin lock. The
> following patch fixed the problem for me and I was able to boot my
> x86_64 box.
ah, subtle problem and nice fix! We are using an RCU trick to delay task
freeing in finish_task_switch(), but kprobe_flush_task() isnt done in
put_task_struct(). [neither would it be right to flush kprobes there.]
I've released -rt4 with this included.
Ingo
next prev parent reply other threads:[~2006-06-28 19:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-27 20:01 2.6.17-rt1 : x86_64 oops Dipankar Sarma
2006-06-28 18:21 ` [PATCH] 2.6.17-rt1 : fix " Dipankar Sarma
2006-06-28 19:32 ` Ingo Molnar [this message]
2006-06-28 20:02 ` Dipankar Sarma
2006-06-29 14:24 ` Ingo Molnar
2006-06-29 16:32 ` Paul E. McKenney
2006-06-29 19:41 ` Paul E. McKenney
2006-06-29 20:11 ` Ingo Molnar
2006-06-29 21:35 ` Paul E. McKenney
2006-07-03 16:57 ` Dipankar Sarma
2006-07-04 4:15 ` Dipankar Sarma
2006-07-04 6:43 ` Ingo Molnar
2006-07-04 6:50 ` Ingo Molnar
2006-07-05 9:11 ` Dipankar Sarma
2006-07-26 7:36 ` Dipankar Sarma
2006-07-06 20:06 ` Paul E. McKenney
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