linux-kernel - Re: [patch 4/9] Remove the TSC synchronization on SMP machines

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: <45C25628.9060100@mbligh.org>
Date:	Thu, 01 Feb 2007 13:05:44 -0800
From:	mbligh <mbligh@...igh.org>
To:	Andi Kleen <ak@...e.de>
Cc:	jbohac@...e.cz, linux-kernel@...r.kernel.org,
	Vojtech Pavlik <vojtech@...e.cz>, ssouhlal@...ebsd.org,
	arjan@...radead.org, tglx@...utronix.de, johnstul@...ibm.com,
	zippel@...ux-m68k.org, andrea@...e.de
Subject: Re: [patch 4/9] Remove the TSC synchronization on SMP machines

Andi Kleen wrote:
> On Thursday 01 February 2007 10:59, jbohac@...e.cz wrote:
>> TSC is either synchronized by design or not reliable
>> to be used for anything, let alone timekeeping.
> 
> In my tree this is already done better by a patch from Ingo.
> Check if they look synchronized and don't use TSC if they are not.

Is it going to notice dynamically when one cpu ramps down/up
during runtime, and looses sync?

M.

-
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/