Re: page fault scalability patch V11 [0/7]: overview

William Lee Irwin III
2004-11-20T03:55:10Z

William Lee Irwin III wrote:
>> Unprivileged triggers for full-tasklist scans are NMI oops material.

On Sat, Nov 20, 2004 at 02:37:04PM +1100, Nick Piggin wrote:
> Hang on, let's come back to this...
> We already have unprivileged do-for-each-thread triggers in the proc
> code. It's in do_task_stat, even. Rss reporting would basically just
> involve one extra addition within that loop.
> So... hmm, I can't see a problem with it.

/proc/ triggering NMI oopses was a persistent problem even before that
code was merged. I've not bothered testing it as it at best aggravates it.

And thread groups can share mm's. do_for_each_thread() won't suffice.

-- wli