linux-kernel - Re: [PATCH][v2] timekeeping: Fix memory overwrite of sleep_time

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Message-ID: <alpine.DEB.2.11.1607291458090.19896@nanos>
Date:	Fri, 29 Jul 2016 14:59:09 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Chen Yu <yu.c.chen@...el.com>
cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	John Stultz <john.stultz@...aro.org>,
	Xunlei Pang <xpang@...hat.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Linux Kernel Mail List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH][v2] timekeeping: Fix memory overwrite of sleep_time_bin
 array

On Fri, 29 Jul 2016, Chen Yu wrote:
> On Tue, Jul 19, 2016 at 12:40:14PM +0200, Thomas Gleixner wrote:
> 1st is to bypass the sleep time if pm_trace is involved(a little complicated
>     because it needs to deal with historical pm_trace), or
> 
> 2nd version is to introduce a sysfs interface to allow the
>     users to specify the threshold of sleep time, any delta
>     of tsc bigger than the threshold would be regarded as invalid.

That one is really overkill. We provide a proper sanity measure for this and
be done with it.

Thanks,

	tglx