Thread (36 messages) 36 messages, 7 authors, 2007-05-28

Re: [PATCH 2/3] powermac: proper time of day after resume

From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2007-01-24 09:33:06

On Wed, 2007-01-24 at 09:54 +0100, Gabriel Paubert wrote:
Isn't there a way to obtain a better resolution? 
Not that I know.
The RTC has a resolution on 1 second AFAIR. This means that there will
be an error of up to 1 second after resume. If you run NTP, it will
ultimately be corrected (I believe) but it may take a fairly long time
given the loop bandwidth of NTP, which will also probably write for a
while crap values into its drift file (/var/lib/ntp/ntp.drift on Debian 
but location varies with distribution).
But then, people suspending/resuming laptops know what to (or not to)
expect I suppose :-)

Ben.
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