[Xen-devel] Re: [patch] x86, paravirt-spinlocks: fix boot hang

[Ingo Molnar <mingo@xxxxxxx>]

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

>> should never
>>     be built with -pg (which ftrace does). Marking paravirt.o as 
>>     non-pg and marking all spinlock ops as always-inline solve the 
>>     hang.
>>    
>
> Thanks Ingo, that would have taken me a while to work out.

yeah, i figured i'd be the better candidate to debug ftrace related 
problems ;-)

> Presumably that means that xen/smp.o should also be built without -pg.  
> In fact, should I move the spinlock code into its own file, so that 
> ftrace can cover as much as it can?

hm, yeah. Anything that can be called via the lowest level spinlock 
functions should be either notrace, or, better, in a -pg-excluded .o 
file. Putting it all into a separate file would cover it nicely i think.

        Ingo

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