lkml.org 
[lkml]   [2016]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH][RFC v7] timekeeping: Ignore the bogus sleep time if pm_trace is enabled
On Thu, 10 Nov 2016, 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>
> Cc: Pavel Machek <pavel@ucw.cz>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Chen Yu <yu.c.chen@intel.com>


Acked-by: Thomas Gleixner <tglx@linutronix.de>

\
 
 \ /
  Last update: 2016-11-10 18:20    [W:0.137 / U:0.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site