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Subject: Re: No 100 HZ timer !
To: mbs@mc.com (Mark Salisbury)
Date: Mon, 9 Apr 2001 21:12:16 +0100 (BST)
Cc: jdike@karaya.com (Jeff Dike), schwidefsky@de.ibm.com,
        linux-kernel@vger.kernel.org
In-Reply-To: <01040914220214.01893@pc-eng24.mc.com> from "Mark Salisbury" at Apr 09, 2001 02:19:28 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> this is one of linux biggest weaknesses.  the fixed interval timer is a
> throwback.  it should be replaced with a variable interval timer with interrupts
> on demand for any system with a cpu sane/modern enough to have an on-chip
> interrupting decrementer.  (i.e just about any modern chip)

Its worth doing even on the ancient x86 boards with the PIT. It does require
some driver changes since


	while(time_before(jiffies, we_explode))
		poll_things();

no longer works

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