linux-kernel - Re: [PATCHv3] ftrace: Provide trace clock monotonic raw

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: <20150508121514.51863aed@gandalf.local.home>
Date:	Fri, 8 May 2015 12:15:14 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Drew Richardson <drew.richardson@....com>,
	Peter Zijlstra <peterz@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Wade Cherry <Wade.Cherry@....com>,
	Pawel Moll <Pawel.Moll@....com>
Subject: Re: [PATCHv3] ftrace: Provide trace clock monotonic raw

On Fri, 8 May 2015 09:05:24 -0700
John Stultz <john.stultz@...aro.org> wrote:


> Yea. No objections from me wrt the functionality of the patch.

Can I take that as an Acked-by?

> 
> I'd just again maybe caution folks to not go too far in assuming
> CLOCK_MONOTONIC_RAW doesn't have frequency changes, as the underlying
> hardware will drift due to varying thermal conditions.

I totally understand this, but that's a hardware limitation (outside
the control of software). But CLOCK_MONOTONIC can drift due to software
updates, which to me, is a significant difference.

-- Steve

--
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/