Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
From: Alan Cox
Date: Thu Jul 14 2005 - 17:45:17 EST
> just doesn't realize that the latter is a bit more complicated exactly
> because the latter is a hell of a lot more POWERFUL. Trying to get rid of
> jiffies for some religious reason is _stupid_.
Getting rid of jiffies in its current form is a huge win for very
non-religious reasons. Jiffies is expensive in power management and
virtualisation because you have to maintain it.
Swap jiffies for jiffies() and the world gets a lot better.
In actual fact you also want to fix users of
while(time_before(foo, jiffies)) { whack(mole); }
to become
init_timeout(&timeout);
timeout.expires = jiffies + n
add_timeout(&timeout);
while(!timeout_expired(&timeout)) {}
Which is a trivial wrapper around timers as we have them now
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