linux-kernel - Re: [PATCH] cacheinfo: Introduce cache id

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: <20160701183536.GE4749@pd.tnic>
Date:	Fri, 1 Jul 2016 20:35:36 +0200
From:	Borislav Petkov <bp@...e.de>
To:	"Yu, Fenghua" <fenghua.yu@...el.com>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	"Anvin, H Peter" <h.peter.anvin@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	"Shankar, Ravi V" <ravi.v.shankar@...el.com>,
	Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>
Subject: Re: [PATCH] cacheinfo: Introduce cache id

On Fri, Jul 01, 2016 at 06:01:06PM +0000, Yu, Fenghua wrote:
> Cache id is unique on the same level of cache across platform.

Btw, I forgot to ask in the reply to Tony: how are those cache IDs
exactly going to be used? An example please...

> Could you check cpu#/cache/index#/shared_cpu_map or shared_cpu_list.

Bah, my kvm is on an AMD guest - forget what it says :-)

> Cache id is unique on the same level across platform.
> 
> #find /sys/device/system/cpu/. -name id|xargs cat

Btw, you could do

grep . /sys/devices/system/cpu/cpu*/cache/index*/id

and it'll give you the absolute filepaths too, so that the output is
parseable easier.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--