Re: [PATCH] add a clear_pages function to clear pages of higher order

From: Christoph Lameter <clameter_at_engr.sgi.com>
Date: 2005-03-25 05:41:06
On Thu, 24 Mar 2005, David Mosberger wrote:

> That's definitely the case.  See my earlier post on this topic:
>
>   http://www.gelato.unsw.edu.au/linux-ia64/0409/11012.html
>
> Unfortunately, nobody reported any results for larger machines and/or
> more interesting workloads, so the patch is in limbo at this time.
> Clearly, if the CPU that's clearing the page is likely to use that
> same page soon after, it'd be useful to use temporal stores.


So it would be useful to have

clear_page 	-> Temporal. Only zaps one page

	and

clear_pages	-> Zaps arbitrary order of page non-temporal


Rework the clear_pages patch to do just that? Maybe rename clear_pages
clear_pages_nt?

prep_zero_page would use a temporal clear for an order 0 page but a
nontemporal clear for higher order pages.
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Received on Thu Mar 24 13:47:04 2005

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