linux-kernel - Re: [PATCH -tip] perf_counter/x86: Fix incorrect default branch

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:	Tue, 9 Jun 2009 15:23:13 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yong Wang <yong.y.wang@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -tip] perf_counter/x86: Fix incorrect default branch

* Yong Wang <yong.y.wang@...ux.intel.com> wrote:

> The event selector and UMASK values of Nehalem do not apply to all 
> Intel processors.

The idea was to offer _some_ sort of table on new CPUs, instead of 
nothing...

Eventually Intel stops changing those model specific index values in 
future CPUs and puts them into architectural perfmon, for 
fundamental stats like L1/LLC cache statistics.

In that case defaulting to the latest (known) enumeration might work 
out to be just the thing used by all future CPUs.

So this is a subtle hint ;-)

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/