Re: [PATCH] fs: fcntl_setlease defies lease_init assumptions

[Nick Piggin]

Manfred Spraul wrote:

> Christoph Lameter wrote:
>
> > virt_to_page is not cheap on NUMA.
> >
> >  
> I know. But it was a design assumption when I wrote the slab allocator.
> Acutally, it's not cheap on non-NUMA either. And the PageCompound() 
> check adds an additional branch.


Just FYI, the PageCompound check can go as soon as nommu stops trying to 
do its
broken page refcounting on slab pages (whenever that happens :P).
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