Date: Fri, 4 Feb 2005 10:31:17 -0700 (MST)
From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
To: Tony Lindgren <tony@atomide.com>
cc: Pavel Machek <pavel@suse.cz>,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>,
       Arjan van de Ven <arjan@infradead.org>,
       Martin Schwidefsky <schwidefsky@de.ibm.com>,
       Andrea Arcangeli <andrea@suse.de>, George Anzinger <george@mvista.com>,
       Thomas Gleixner <tglx@linutronix.de>, john stultz <johnstul@us.ibm.com>,
       Lee Revell <rlrevell@joe-job.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Dynamic tick, version 050127-1
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On Fri, 4 Feb 2005, Tony Lindgren wrote:

> Yes, it's safer to keep the timer periodic, although it's
> used for oneshot purposes for the skips. If the timer interrupt
> got missed for some reason, the system would be able to recover when
> it's in periodic mode.
> 
> And with some timers, we can do the reprogramming faster, as we just
> need to load the new value.
> 
> I could not figure out how to disable the interrupts for PIT
> when local APIC is used and the ticks to skip is longer than PIT
> would allow. So I just changed the mode temporarily to disable it.
>
> Does anybody know if there's a way to stop PIT interrupts while
> keeping it in the periodic mode?

disable_irq(0) ?
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