From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Joonsoo Kim <js1304@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] mm: introduce numa_zero_pfn
Date: Wed, 12 Dec 2012 20:09:04 +0200 [thread overview]
Message-ID: <20121212180904.GA21909@otc-wbsnb-06> (raw)
In-Reply-To: <1355331819-8728-1-git-send-email-js1304@gmail.com>
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On Thu, Dec 13, 2012 at 02:03:39AM +0900, Joonsoo Kim wrote:
> Currently, we use just *one* zero page regardless of user process' node.
> When user process read zero page, at first, cpu should load this
> to cpu cache. If node of cpu is not same as node of zero page, loading
> takes long time. If we make zero pages for each nodes and use them
> adequetly, we can reduce this overhead.
>
> This patch implement basic infrastructure for numa_zero_pfn.
> It is default disabled, because it doesn't provide page coloring and
> some architecture use page coloring for zero page.
Do you have benchmark numbers?
--
Kirill A. Shutemov
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next prev parent reply other threads:[~2012-12-12 18:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-12 17:03 Joonsoo Kim
2012-12-12 18:09 ` Kirill A. Shutemov [this message]
2012-12-12 20:12 ` Christoph Lameter
2012-12-12 20:15 ` Andi Kleen
2012-12-17 13:58 ` JoonSoo Kim
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