Re: [Patch 3/3] prepopulate/cache cleared pages

[Nick Piggin]

Andi Kleen wrote:
> On Thursday 23 February 2006 13:41, Ingo Molnar wrote:
>
>
> > What Arjan did is quite nifty, as it moves the page clearing out from 
> > under the mmap_sem-held critical section.
>
>
> So that was the point not the rescheduling under lock? Or both?
>
> BTW since it touches your area of work you could comment what
> you think about not using voluntary preempt points for fast sleep locks
> like I later proposed.
>
>
> > How that is achieved is really  
> > secondary, it's pretty clear that it could be done in some nicer way.
>
>
> Great we agree then.

I'm worried about the situation where we allocate but don't use the
new page: it blows quite a bit of cache. Then, when we do get around
to using it, it will be cold(er).

Good to see someone trying to improve this area, though.

--
SUSE Labs, Novell Inc.
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