From: Andi Kleen <ak@suse.de>
To: Len Brown <len.brown@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
Andrew Morton <akpm@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
mingo@elte.hu, linux-kernel <linux-kernel@vger.kernel.org>,
"Shah, Rajesh" <rajesh.shah@intel.com>,
John Stultz <johnstul@us.ibm.com>, Andi Kleen <ak@suse.de>,
Asit K Mallick <asit.k.mallick@intel.com>
Subject: Re: [RFC][PATCH] i386 x86-64 Eliminate Local APIC timer interrupt
Date: Thu, 5 May 2005 14:03:11 +0200 [thread overview]
Message-ID: <20050505120311.GM28441@wotan.suse.de> (raw)
In-Reply-To: <1115266581.7644.52.camel@d845pe>
On Thu, May 05, 2005 at 12:16:21AM -0400, Brown, Len wrote:
> On Fri, 2005-04-29 at 22:43, Pallipadi, Venkatesh wrote:
>
> > The patch as it is should handle 8259 case using the regular APIC
> > timer. It only adds broadcast when IOAPIC is used for timer
> > interrupt.
>
> While they don't need the broadcast capability of this patch,
> uniprocessors do need the change to stop using LAPIC timer
> if they support C3 (as virtually all laptops do).
> It was a mistake to allow using the LOC on a uniprocessor
> in the first place -- as the UP system runs perfectly fine
> with timers coming in on IRQ0 and doesn't need another interrupt.
Yes I agree. It does not make much sense to run two timers
on a CPU. I already changed that in my x86-64 tree. i386 will
hopefully follow at some point.
-Andi
next prev parent reply other threads:[~2005-05-05 12:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-30 2:43 Pallipadi, Venkatesh
2005-05-05 4:16 ` Len Brown
2005-05-05 12:03 ` Andi Kleen [this message]
2005-05-05 12:32 ` Maciej W. Rozycki
-- strict thread matches above, loose matches on Subject: below --
2005-04-30 19:40 Protasevich, Natalie
2005-04-30 2:55 Pallipadi, Venkatesh
2005-04-30 3:06 ` Andrew Morton
2005-05-02 21:19 ` Pavel Machek
2005-04-30 0:26 Venkatesh Pallipadi
2005-04-30 0:46 ` Zwane Mwaikambo
2005-04-30 0:58 ` Zwane Mwaikambo
2005-04-30 1:13 ` Zwane Mwaikambo
2005-04-30 2:32 ` Andrew Morton
2005-05-02 16:38 ` Andi Kleen
2005-05-02 17:16 ` Venkatesh Pallipadi
2005-05-02 19:08 ` Andi Kleen
2005-05-02 20:27 ` Venkatesh Pallipadi
2005-05-03 14:17 ` Andi Kleen
2005-05-05 5:33 ` Len Brown
2005-05-05 12:19 ` Andi Kleen
2005-05-11 18:12 ` Tony Lindgren
2005-05-05 20:45 ` George Anzinger
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