Christoph Lameter wrote:
quoted text
>> Hmm, where? page_address() already references ->virtual. I suppose
>> CONFIG_SLUB_DEBUG is a no no as well then so do we want to add a
>> CONFIG_KSIZE_DEBUG config option...? (Btw, I removed the BUG_ON() from kfree()
>> as spotted by Vegard Nossum.)
> 
> If it has to be then add CONFIG_KSIZE_DEBUG. There are a number of 
> debugging techniques (kmem_check?) that should not be compiled in. Maybe 
> add a new config option for those. CONFIG_SLUB_ENABLE_EXPENSIVE_DEBUG?

Oh, kmemcheck is a separate config option already and it's *much much* 
more expensive than the ksize() checks will ever be so they shouldn't be 
bundled together anyway.

		Pekka
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