Re: [RFC][PATCH] new timeofday core subsystem (v. A2)

[Tim Bird <tim.bird@xxxxxxxxxxx>]

john stultz wrote:
> Interesting patch. Indeed, the trade off is just how quickly you want to
> boot vs how much drift you gain each suspend/resume cycle. Assuming all
> of the clocks are good, your patch could introduce up to 2 seconds of
> drift each suspend/resume cycle. 

If we're not writing to the RTC on suspend, then I believe the drift is
capped.  For some consumer products, 2 seconds of drift is OK.

Nigel, does the RTC get written to, or just read, on suspend?

Also, I'm worried about the clock appearing to run backwards over a suspend.
Unless a suspend/resume cycle took less than 1 second, I don't think this could
happen.  Is that right?

=============================
Tim Bird
Architecture Group Chair, CE Linux Forum
Senior Staff Engineer, Sony Electronics
=============================
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/