Re: page fault scalability patch final : i386 tested, x86_64 support added

Herbert Poetzl
2004-08-30T17:02:11Z

On Fri, Aug 27, 2004 at 11:06:37PM -0700, Andrew Morton wrote:
> Christoph Lameter <clameter@sgi.com> wrote:
> >
> > > As I said - for both these applications we need a new type which is
> > > atomic64_t on 64-bit and atomic_t on 32-bit.
> >
> > That is simply a new definition in include/asm-*/atomic.h
> >
> > so
> >
> > #define atomic_long atomic64_t
> >
> > on 64 bit
> >
> > and
> >
> > #define atomic_long atomic_t
> >
> > on 32bit?
>
> No, a whole host of wrappers are needed - atomic_long_inc/dec/set/read,
> etc. For page->_count we'll also need the fancier functions such as
> atomic_long_add_return().

hmm, please correct me, but last time I checked
atomic_add_return() wasn't even available for i386
for example ...

best,
Herbert

> As I said: let's address this later on. It's probably not an issue for RSS
> until 4-level pagetables come along.
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