linux-kernel - Re: [PATCH] mm: introduce numa_zero

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 12 Dec 2012 20:09:04 +0200
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Joonsoo Kim <js1304@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] mm: introduce numa_zero_pfn

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

Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)