[arch-dev-public] [PATCH 1/3] rc.sysinit: background hwclock calls

Dan McGee dan at archlinux.org
Sun Dec 13 22:28:11 EST 2009

On Sun, Dec 13, 2009 at 9:26 PM, Dan McGee <dan at archlinux.org> wrote:
> hwclock calls appear to block somewhere between 1 and 2 seconds when we have
> back-to-back calls. My theory (without looking at the code) is that hwclock
> has to synchronize to the 1 second intervals of the hardware clock, so it
> can sometimes take up to a second to complete.
> To get around this unpleasant behavior, we can background the calls at point
> X in the boot sequence, and then later at point Y in the script (when we
> absolutely need the clock actions to be complete), we wait on the
> subprocess. This allows the rest of the boot sequence, after the hwclock
> code block, to continue until the point where we wait on the subprocess.
> Signed-off-by: Dan McGee <dan at archlinux.org>
> ---

I discussed this patch series with Thomas a while back; I'd be happy
to answer questions on it. They have worked great on my Eee over the
last month.


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