linux-kernel - Re: Broken process startup times after suspend (regression)

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Message-ID: <787b0d920705052016o2d7e36ffsdc80302228b0ee1e@mail.gmail.com>
Date:	Sat, 5 May 2007 23:16:25 -0400
From:	"Albert Cahalan" <acahalan@...il.com>
To:	johnstul@...ibm.com, tjanouse@...hat.com,
	linux-kernel@...r.kernel.org, tsmetana@...hat.com, riel@...hat.com
Subject: Re: Broken process startup times after suspend (regression)

john stultz writes:

> Indeed. The monotonic clock's behavior around suspend and resume
> is poorly defined. When we increased it, folks didn't like the
> fact that uptime would increase while a system was suspended.

The uptime really does need to increase during suspend. Otherwise,
things get really weird with devices like the OLPC XO which will be
sleeping between keystrokes. You could run the device for hours,
yet get an uptime of only a few minutes. Suspended time should get
counted as stolen time, same as when a hypervisor takes away time.
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