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Date: Tue, 8 Nov 2016 20:50:06 +0800
From: Chen Yu <yu.c.chen@intel.com>
To: x86@kernel.org
Cc: Pavel Machek <pavel@ucw.cz>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, linux-pm@vger.kernel.org,
        rtc-linux@googlegroups.com, linux-kernel@vger.kernel.org,
        Thomas Gleixner <tglx@linutronix.de>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>, Len Brown <lenb@kernel.org>,
        John Stultz <john.stultz@linaro.org>, Xunlei Pang <xlpang@redhat.com>
Subject: Re: [PATCH 1/2][RFC v6] timekeeping: Ignore the bogus sleep time if
 pm_trace is enabled
Message-ID: <20161108125006.GD7191@yu-desktop-1.sh.intel.com>
References: <cover.1478589736.git.yu.c.chen@intel.com>
 <e0ed3331627184f3da6243b00cfa69dd78e85514.1478589736.git.yu.c.chen@intel.com>
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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.