linux-kernel - Re: [PATCH v4 00/17] 64-bit friendly generic sched

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Message-ID: <20130719002315.GF27430@codeaurora.org>
Date:	Thu, 18 Jul 2013 17:23:15 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Fabio Estevam <fabio.estevam@...escale.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Srinidhi Kasagar <srinidhi.kasagar@...ricsson.com>,
	linux-arm-msm@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Barry Song <Baohua.Song@....com>,
	Will Deacon <will.deacon@....com>,
	linux-kernel@...r.kernel.org, Jingchang Lu <b35083@...escale.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Christopher Covington <cov@...eaurora.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Shawn Guo <shawn.guo@...aro.org>,
	Tomasz Figa <t.figa@...sung.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 00/17] 64-bit friendly generic sched_clock()

On 07/18, John Stultz wrote:
> On 07/18/2013 04:21 PM, Stephen Boyd wrote:
> >This patchset adds support for 64 bit counters in the generic
> >sched_clock code and converts drivers over to use it. Based
> >on v3.11-rc1.
> >
> >Changes since v3:
> >  * Move to use seqcount to fix issues with 64-bit cyc counters
> >  * Move to hrtimer to fix underflow/overflow errors in wraparound
> >    calculation
> >  * Use of 1 hour in clocks_calc_mult_shift
> >  * Converted over drivers in drivers/clocksource
> 
> I've not been able to take a deep review yet, but this looks pretty
> much like what we discussed last week, so I'm happy with it so far.
> Has this gotten much testing (on both 32 and 64bit systems?)

I've tested it on a couple 32 bit systems. I'll ask around for
some 64 bit system testing.

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