On Sun, Mar 16 2008, Jeremy Fitzhardinge wrote:
quoted text
> Jens Axboe wrote:
> >On Fri, Mar 14 2008, Jeremy Fitzhardinge wrote:
> >  
> >>Jens Axboe wrote:
> >>    
> >>>rom: Nick Piggin <npiggin@suse.de>
> >>> 
> >>>      
> >>Why is this necessary?  How is smp_call_function_single slow?
> >>    
> >
> >Because it's completely serialized by the call_lock spinlock.
> >  
> 
> Hm, yes.  Would it be possible to implement smp_call_function_mask in a 
> generic way to avoid that?  Turn the static structure into a per-cpu 
> request list?

Have you looked at the patches you are replying to? :-)

-- 
Jens Axboe

--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/