The behavior of linux (in both 2.4.x and 2.6.x) is when the processor

sleeps, timeouts on select don't take into account the sleep time,

only the run time.
For example, this program should pause for 10 minutes -- however

if we go into S3 in the middle its pausing for (10 minutes + time in

S3)
I saw this on both 2.6.20 and 2.6.22...
marty
-----Original Message-----

From: linux-pm-bounces@lists.linux-foundation.org

[mailto:linux-pm-bounces@lists.linux-foundation.org] On Behalf Of Pavel

Machek

Sent: Thursday, August 28, 2008 10:30 AM

To: Leisner, Martin

Cc: linux-pm@lists.linux-foundation.org

Subject: Re: [linux-pm] select with timeout across S3
That sounds like a bug. Can you write small demo program and post it

to lkml?
--=20

(english) http://www.livejournal.com/~pavelmachek

(cesky, pictures)

http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Can you test this on 2.6.27-rc? We did have some fixes in that

area....
							Pavel
--

(english) http://www.livejournal.com/~pavelmachek

(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

--

Hi,
dito.
This also happened to me a couple (4?) months ago, likely on 2.6.24 or

2.6.25.

And for me it had the "very nice" effect of not obeying DHCP lease time,

with a red-faced IT guy appearing in my door the next morning thusly... ;)
From examining it more closely, it was rather obvious that select timeout

happened maybe 10 hours later than it should have (with 12h lease time),

due to hitting nightly S2R about two hours into the lease time.

Annoying, to say the least.
I think I then privately asked some timer guy about it, but I didn't get

a reply.
The DHCP client to hit this was pump, IIRC (can re-check).
Andreas Mohr

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