Re: [PATCH 1/2][RFC v6] timekeeping: Ignore the bogus sleep time if pm_trace is enabled

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From	Chen Yu <yu.c.chen@intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2][RFC v6] timekeeping: Ignore the bogus sleep time if pm_trace is enabled
Date	Tue, 08 Nov 2016 13:50:02 +0100
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On Tue, Nov 08, 2016 at 05:01:35PM +0800, Chen Yu wrote:
> From: Thomas Gleixner <tglx@linutronix.de>
> 
> 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 to bypass the bogus rtc interval when pm_trace is enabled.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Len Brown <lenb@kernel.org>
> Cc: John Stultz <john.stultz@linaro.org>
> Cc: Xunlei Pang <xlpang@redhat.com>
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>
> ---
>
[cut]
Will resend another version. Thanks.

Thread

[PATCH 0/2][RFC v6] Ignore bogus sleep time if pm_trace is enabled Chen Yu <yu.c.chen@intel.com> - 2016-11-08 10:00 +0100
  [PATCH 1/2][RFC v6] timekeeping: Ignore the bogus sleep time if pm_trace is enabled Chen Yu <yu.c.chen@intel.com> - 2016-11-08 10:00 +0100
    Re: [PATCH 1/2][RFC v6] timekeeping: Ignore the bogus sleep time if  pm_trace is enabled Chen Yu <yu.c.chen@intel.com> - 2016-11-08 13:50 +0100
  [PATCH 2/2][RFC v6] PM / sleep: save/restore RTC time after resumed if pm_trace enabled Chen Yu <yu.c.chen@intel.com> - 2016-11-08 10:00 +0100
    Re: [PATCH 2/2][RFC v6] PM / sleep: save/restore RTC time after  resumed if pm_trace enabled Chen Yu <yu.c.chen@intel.com> - 2016-11-08 13:40 +0100

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