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

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Date:	Wed, 24 Jul 2013 10:44:21 -0400
From:	Christopher Covington <cov@...eaurora.org>
To:	Stephen Boyd <sboyd@...eaurora.org>
CC:	John Stultz <john.stultz@...aro.org>, 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>,
	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>
Subject: Re: [PATCH v4 00/17] 64-bit friendly generic sched_clock()

On 07/18/2013 07:21 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()
> 
>  arch/arm/kernel/arch_timer.c              |  14 ----
>  arch/arm64/Kconfig                        |   1 +
>  arch/arm64/kernel/time.c                  |  10 ---
>  drivers/clocksource/arm_arch_timer.c      |   4 ++
>  drivers/clocksource/bcm2835_timer.c       |   4 +-
>  drivers/clocksource/clksrc-dbx500-prcmu.c |   5 +-
>  drivers/clocksource/dw_apb_timer_of.c     |   4 +-
>  drivers/clocksource/mxs_timer.c           |   4 +-
>  drivers/clocksource/nomadik-mtu.c         |   4 +-
>  drivers/clocksource/samsung_pwm_timer.c   |   4 +-
>  drivers/clocksource/tegra20_timer.c       |   4 +-
>  drivers/clocksource/time-armada-370-xp.c  |   4 +-
>  drivers/clocksource/timer-prima2.c        |   6 +-
>  drivers/clocksource/vf_pit_timer.c        |   4 +-
>  include/linux/clocksource.h               |   2 +
>  include/linux/sched_clock.h               |   7 +-
>  kernel/time/clocksource.c                 |  45 ++++++++-----
>  kernel/time/sched_clock.c                 | 105 +++++++++++++++---------------
>  18 files changed, 116 insertions(+), 115 deletions(-)
> 

I ran 32-bit and 64-bit kernels with these patches on the Versatile Express
software model and things looked fine, so for the applicable patches,

Tested-by: Christopher Covington <cov@...eaurora.org>

-- 
Employee of Qualcomm Innovation Center, Inc.
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