linux-kernel - Re: [RFC][PATCH] clocksource: Avoid selecting mult values that might overflow when adjusted

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Date:	Wed, 2 Nov 2011 10:27:25 +0800
From:	Chen Jie <chenj@...ote.com>
To:	John Stultz <john.stultz@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Yong Zhang <yong.zhang0@...il.com>,
	David Daney <ddaney.cavm@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC][PATCH] clocksource: Avoid selecting mult values that might
 overflow when adjusted

Hi,
We've backported the patch to our kernel, and redo the test[1] that
formerly caused system stall.
After 12-hours, no system stall observed.



Regards,
Chen Jie

----
[1] The test is just do "sleep 5 && reboot " on our mips64 compatible
CPU@...MHz. At each boot time, BIOS will calculate CPU Freq. Some CPU
Freq(around 500MHz) caused easy-overflow clock mult values in the
former tests, which then led to "sleep 5" never return.
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