Re: page fault scalability patch V12 [0/7]: Overview and performance

Christoph Lameter
2004-12-17T03:31:43Z

On Sun, 12 Dec 2004, William Lee Irwin III wrote:

> On Sun, Dec 12, 2004 at 09:33:11AM +0000, Hugh Dickins wrote:
> > Oh, hold on, isn't handle_mm_fault's pmd without page_table_lock
> > similarly racy, in both the 64-on-32 cases, and on architectures
> > which have a more complex pmd_t (sparc, m68k, h8300)? Sigh.
>
> yes.

Those may fall back to use the page_table_lock for individual operations
that cannot be realized in an atomic way.