Messages in this thread | | | Date | Thu, 29 Jun 2006 01:32:47 +0530 | From | Dipankar Sarma <> | Subject | Re: [PATCH] 2.6.17-rt1 : fix x86_64 oops |
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On Wed, Jun 28, 2006 at 09:32:56PM +0200, Ingo Molnar wrote: > > * 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
Yes, otherwise it would have been hell to do __put_task_struct() with preemption disabled.
> put_task_struct(). [neither would it be right to flush kprobes there.] > I've released -rt4 with this included.
OK, I need to catch up, but I see a lot of oops while running rcutorture in my box (rt1). I am investigating this atm.
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