Re: deferred rss update instead of sloppy rss

Andrew Morton
2004-11-22T22:45:07Z

Christoph Lameter <clameter@sgi.com> wrote:
>
> > just to prevent transient gross inaccuracies. For some value of "16".
>
> The page fault code only increments rss. For larger transactions that
> increase / decrease rss significantly the page_table_lock is taken and
> mm->rss is updated directly. So no
> gross inaccuracies can result.

Sure. Take a million successive pagefaults and mm->rss is grossly
inaccurate. Hence my suggestion that it be spilled into mm->rss
periodically.