Re: [PATCH 1/7] x86-64: introduce fast variant of smp_call_function_single()

[Jens Axboe]

On Fri, Mar 14 2008, Jeremy Fitzhardinge wrote:
> Jens Axboe wrote:
> >rom: Nick Piggin <npiggin@xxxxxxx>
> >  
> 
> Why is this necessary?  How is smp_call_function_single slow?

Because it's completely serialized by the call_lock spinlock.

-- 
Jens Axboe

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