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From: Ingo Molnar <mingo@kernel.org>
To: John Stultz <john.stultz@linaro.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
	Joel Fernandes <joelaf@google.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Richard Cochran <richardcochran@gmail.com>,
	Prarit Bhargava <prarit@redhat.com>
Subject: Re: [PATCH 7/7] trace: Update documentation for mono, mono_raw and boot clock
Date: Tue, 29 Nov 2016 08:26:51 +0100	[thread overview]
Message-ID: <20161129072651.GD29412@gmail.com> (raw)
In-Reply-To: <1480372524-15181-8-git-send-email-john.stultz@linaro.org>


* John Stultz <john.stultz@linaro.org> wrote:

> +	  boot: This is the boot clock (CLOCK_BOOTTIME) and is based on the
> +		fast monotonic clock, but also accounts for time spent in
> +		suspend. Since the clock access is designed for use in
> +		tracing in the suspend path, some side effects are possible
> +		if clock is accessed after the suspend time is accounted before
> +		the fast mono clock is updated. In this case, the clock update
> +		appears to happen slightly sooner than it normally would have.
> +		Also on 32-bit systems, its possible that the 64-bit boot offset
> +		sees a partial update. These effects are rare and post
> +		processing should be able to handle them. See comments on
> +		ktime_get_boot_fast_ns function for more information.

s/its possible/it's possible
s/comments on ktime_get_boost_fast_ns function/comments in the ktime_get_boost_fast_ns() function

Thanks,

	Ingo

  parent reply	other threads:[~2016-11-29  7:27 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-28 22:35 [GIT PULL][PATCH 0/7] Timekeeping changes for 4.10 (take 2) John Stultz
2016-11-28 22:35 ` [PATCH 1/7] selftests/timers: Fix spelling mistake "Asyncrhonous" -> "Asynchronous" John Stultz
2016-11-29 17:10   ` [tip:timers/core] " tip-bot for Colin Ian King
2016-11-28 22:35 ` [PATCH 2/7] timekeeping: Ignore the bogus sleep time if pm_trace is enabled John Stultz
2016-11-29  7:19   ` Ingo Molnar
2016-11-29  9:38     ` Chen Yu
2016-11-29 17:10   ` [tip:timers/core] " tip-bot for Chen Yu
2016-11-28 22:35 ` [PATCH 3/7] timekeeping: clocksource_cyc2ns: Document intended range limitation John Stultz
2016-11-29 17:11   ` [tip:timers/core] timekeeping/clocksource_cyc2ns: " tip-bot for Chris Metcalf
2016-11-28 22:35 ` [PATCH 4/7] time: alarmtimer: Add the tracepoints for alarmtimer John Stultz
2016-11-29  7:23   ` Ingo Molnar
2016-11-29  8:23     ` Baolin Wang
2016-11-29  9:12       ` Ingo Molnar
2016-11-29 11:52         ` Baolin Wang
2016-11-29 12:06   ` Thomas Gleixner
2016-11-30 11:43     ` Baolin Wang
2016-12-01  2:34     ` Baolin Wang
2016-12-01 13:52   ` [tip:timers/core] alarmtimer: Add tracepoints for alarm timers tip-bot for Baolin Wang
2016-11-28 22:35 ` [PATCH 5/7] timekeeping: Add a fast and NMI safe boot clock John Stultz
2016-11-29 17:11   ` [tip:timers/core] " tip-bot for Joel Fernandes
2016-11-28 22:35 ` [PATCH 6/7] trace: Add an option for boot clock as trace clock John Stultz
2016-11-28 23:05   ` Steven Rostedt
2016-11-29 17:12   ` [tip:timers/core] " tip-bot for Joel Fernandes
2016-11-28 22:35 ` [PATCH 7/7] trace: Update documentation for mono, mono_raw and boot clock John Stultz
2016-11-28 23:07   ` Steven Rostedt
2016-11-29  7:26   ` Ingo Molnar [this message]
2016-11-29 16:10     ` Joel Fernandes
2016-11-29 16:11       ` Thomas Gleixner
2016-11-29 17:13   ` [tip:timers/core] " tip-bot for Joel Fernandes

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