Re: [PATCH] scheduler: fix x86 regression in native_sched_clock

[Ingo Molnar]

* Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> > > A bit risky - it's quite an expansion of code which no longer can 
> > > call printk.
> > > 
> > > You might want to take that WARN_ON out of __update_rq_clock() ;)
> > 
> > hm, dont we already detect printk recursions and turn them into a 
> > silent return instead of a hang/crash?
> 
> We'll pop the locks and will proceed to do the nested printk.  So 
> __update_rq_clock() will need rather a lot of stack ;)

yeah. That behavior of printk is rather fragile. I think my previous 
patch should handle all such incidents.

	Ingo
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