On Tue, 20 Mar 2007, Paul Mackerras wrote:
> Christoph Lameter writes:
>
> > +static inline void *quicklist_alloc(int nr, gfp_t flags, void (*ctor)(void
> > *))
> > +{
>
> ...
>
> > + p = (void *)__get_free_page(flags | __GFP_ZERO);
>
> This will cause problems on 64-bit powerpc, at least with 4k pages,
> since the pmd and pgd levels only use 1/4 of a page.
quicklists are only useful for page sized allocations. If you have smaller
sizes then by all means continue the use of slab. You do not have a page
struct for each pmd, pgd to do bad things with (like i386) so everything
is just fine.
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