From: Duncan Sands <duncan.sands@math.u-psud.fr>
To: Simon Arlott <3d1f88d2534993eb311hc0vm0003uvpw@thunder.lp0.eu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] cxacru: Poll for device status more frequently.
Date: Wed, 31 Jan 2007 15:27:36 +0100 [thread overview]
Message-ID: <200701311527.39343.duncan.sands@math.u-psud.fr> (raw)
In-Reply-To: <45BFB841.9030200@simon.arlott.org.uk>
> The device is only polled for status every 5 seconds yet status updates
> occur as often as every second - when the line is down the status changes
> between "down" and "attempting to activate" every 2 seconds.
How much overhead does polling involve? [A particularly problematic case
is when polling is failing - I've occasionally seen speedtouch modems
where polling fails every time (not sure why) and for some reason this
increases system load considerably, which is why the speedtch driver has
a dynamic polling interval]. If polling overhead is basically nothing,
then this change is OK with me. Otherwise the next simplest thing to do
is to have a short polling interval when the line is down, and a longer
one when the line is up.
Ciao,
Duncan.
next prev parent reply other threads:[~2007-01-31 14:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-30 21:27 Simon Arlott
2007-01-31 14:27 ` Duncan Sands [this message]
2007-01-31 17:46 ` Simon Arlott
2007-01-31 18:15 ` Duncan Sands
2007-02-11 16:39 ` Simon Arlott
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