Re: [PATCH][RFC v7] timekeeping: Ignore the bogus sleep time if pm_trace is enabled

[Pavel Machek <pavel@ucw.cz>]

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On Thu 2016-11-10 12:55:53, Chen Yu wrote:
> Previously we encountered some memory overflow issues due to
> the bogus sleep time brought by inconsistent rtc, which is
> triggered when pm_trace is enabled, and we have fixed it
> in recent kernel. However it's improper in the first place
> to call __timekeeping_inject_sleeptime() in case that pm_trace
> is enabled simply because that "hash" time value will wreckage
> the timekeeping subsystem.
> 
> This patch is originally written by Thomas, which would bypass
> the bogus rtc interval when pm_trace is enabled.
> Meanwhile, if system succeed to resume back with pm_trace set, the
> users are warned to adjust the bogus rtc either by ntp-date or rdate,
> by resetting pm_trace_rtc_abused to false, otherwise above tools might
> not work as expected.
> 
> Originally-from: Thomas Gleixner <tglx@linutronix.de>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: John Stultz <john.stultz@linaro.org>
> Cc: Xunlei Pang <xlpang@redhat.com>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Len Brown <lenb@kernel.org>
> Cc: "H. Peter Anvin" <hpa@zytor.com>

Acked-by: Pavel Machek <pavel@ucw.cz>

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