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

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Message-ID: <51ED66BE.8040006@linaro.org>
Date:	Mon, 22 Jul 2013 10:07:10 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Russell King <linux@....linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Christopher Covington <cov@...eaurora.org>,
	Barry Song <Baohua.Song@....com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Jingchang Lu <b35083@...escale.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Srinidhi Kasagar <srinidhi.kasagar@...ricsson.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v4 00/17] 64-bit friendly generic sched_clock()

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
>
> Stephen Boyd (17):
>    clocksource: Extract max nsec calculation into separate function
>    sched_clock: Use seqcount instead of rolling our own
>    sched_clock: Use an hrtimer instead of timer
>    sched_clock: Add support for >32 bit sched_clock
>    arch_timer: Move to generic sched_clock framework
>    sched_clock: Remove sched_clock_func() hook
>    clocksource: bcm2835: Switch to sched_clock_register()
>    ocksource: dbx500-prcmu: Switch to sched_clock_register()
>    clocksource: dw_apb_timer_of: Switch to sched_clock_register()
>    clocksource: mxs_timer: Switch to sched_clock_register()
>    clocksource: nomadik: Switch to sched_clock_register()
>    clocksource: samsung_pwm_timer: Switch to sched_clock_register()
>    clocksource: tegra: Switch to sched_clock_register()
>    clocksource: time-armada-370-xp: Switch to sched_clock_register()
>    clocksource: sirf: Switch to sched_clock_register() and use 64 bits
>    clocksource: vf_pit_timer: Switch to sched_clock_register()
>    sched_clock: Deprecate setup_sched_clock()

Ok, so if there's no major objections with this set, here's my plan:

1) I'm going to queue 1-4 in a fortglx/3.12/sched-clock64 branch, I'll 
send git pull requests to both Thomas and Olof, so they can both merge 
the common base for the conversion code in both drivers/clocksource and 
arch/arm.

2) If I can get Catalin's ack on 5/17, I'll queue it and 6/17 for 
tip/timers/core.

3) I'll also queue the rest and send to Thomas or Daniel for 
tip/timers/core.

That sound ok to everyone?

thanks
-john


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