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

Andrew Morton
2004-08-28T06:09:14Z

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().

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