From: Mel Gorman <mel@csn.ul.ie>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Linux Memory Management List <linux-mm@kvack.org>,
Nick Piggin <npiggin@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/3] page-allocator: Move pcp static fields for high and batch off-pcp and onto the zone
Date: Tue, 18 Aug 2009 17:42:17 +0100 [thread overview]
Message-ID: <20090818164216.GA13435@csn.ul.ie> (raw)
In-Reply-To: <alpine.DEB.1.10.0908181015420.32284@gentwo.org>
On Tue, Aug 18, 2009 at 10:18:48AM -0400, Christoph Lameter wrote:
>
> This will increase the cache footprint for the hot code path. Could these
> new variable be moved next to zone fields that are already in use there?
> The pageset array is used f.e.
>
pageset is ____cacheline_aligned_in_smp so putting pcp->high/batch near
it won't help in terms of cache footprint. This is why I located it near
watermarks because it's known they'll be needed at roughly the same time
pcp->high/batch would be normally accessed.
--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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next prev parent reply other threads:[~2009-08-18 16:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-18 11:15 [RFC PATCH 0/3] Reduce searching in the page allocator fast-path Mel Gorman
2009-08-18 11:16 ` [PATCH 1/3] page-allocator: Split per-cpu list into one-list-per-migrate-type Mel Gorman
2009-08-18 11:43 ` Nick Piggin
2009-08-18 13:10 ` Mel Gorman
2009-08-18 13:12 ` Nick Piggin
2009-08-18 22:57 ` Vincent Li
2009-08-19 8:57 ` Mel Gorman
2009-08-18 11:16 ` [PATCH 2/3] page-allocoator: Maintain rolling count of pages to free from the PCP Mel Gorman
2009-08-18 11:16 ` [PATCH 3/3] page-allocator: Move pcp static fields for high and batch off-pcp and onto the zone Mel Gorman
2009-08-18 11:47 ` Nick Piggin
2009-08-18 12:57 ` Mel Gorman
2009-08-18 14:18 ` Christoph Lameter
2009-08-18 16:42 ` Mel Gorman [this message]
2009-08-18 17:56 ` Christoph Lameter
2009-08-18 20:50 ` Mel Gorman
2009-08-18 14:22 ` [RFC PATCH 0/3] Reduce searching in the page allocator fast-path Christoph Lameter
2009-08-18 16:53 ` Mel Gorman
2009-08-18 19:05 ` Christoph Lameter
2009-08-19 9:08 ` Mel Gorman
2009-08-19 11:48 ` Christoph Lameter
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