linux-kernel - Re: [linux-pm] sleepy linux self-test

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Date:	Sun, 03 Feb 2008 14:42:06 -0800
From:	David Brownell <david-b@...bell.net>
To:	rjw@...k.pl
Cc:	pavel@....cz, mingo@...e.hu, linux-pm@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-pm] sleepy linux self-test

> > See the appended; it includes more of Ingo's suggestions.
> > 
> > Since this is increasingly unrelated to the "sleepy linux" concept
> > (a version of what systems like OLPC, N700, and N800 are doing), I
> > got rid of the "sleepy.c" file.
>
> The changes look good to me.

They feel unfinished to me though.  :)

Like using "jiffies" instead of a clocksource, which makes trouble
since the timing covers periods with IRQs disabled.  And the test
mode parameter needs work.

> Well, it would be nice to have this feature in as soon as reasonably possible,
> so that people can include suspend tests in the automated testing.

Except ... "rtcwake" (from util-linux-ng) already supports such
testing, albeit from userspace.   But not the timing tests.

What was the rationale for wanting this done in-kernel?  (Other
than to know it can work portably.)

- Dave

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