Re: [PATCH] 2.6.17-rt1 : fix x86_64 oops

[Ingo Molnar]

* Dipankar Sarma <dipankar@xxxxxxxxxx> 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
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