linux-kernel - Re: [PATCH 1/4] numa,x86: store maximum numa node distance

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]

Message-ID: <20140509094543.GP30445@twins.programming.kicks-ass.net>
Date:	Fri, 9 May 2014 11:45:43 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	riel@...hat.com
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org, mgorman@...e.de,
	chegu_vinod@...com
Subject: Re: [PATCH 1/4] numa,x86: store maximum numa node distance

On Thu, May 08, 2014 at 01:23:28PM -0400, riel@...hat.com wrote:
> From: Rik van Riel <riel@...hat.com>
> 
> Store the maximum node distance, so the numa placement code can do
> better placement on systems with complex numa topology.
> 
> The function max_node_distance will return LOCAL_DISTANCE if the
> system has simple NUMA topology, with only a single level of
> remote distance.
> 
> Signed-off-by: Rik van Riel <riel@...hat.com>
> Tested-by: Chegu Vinod <chegu_vinod@...com>
> ---
>  arch/x86/include/asm/topology.h |  3 +++
>  arch/x86/mm/numa.c              | 25 +++++++++++++++++++++++++
>  include/linux/topology.h        |  3 +++
>  3 files changed, 31 insertions(+)
> 

Why are you doing this in arch code? I would've expected some extra code
to sched_init_numa() which is generic code that analyses the distance
table and reconstructs the actual topology from it.

Content of type "application/pgp-signature" skipped