From: Mark Lord <lkml@rtr.ca>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: CONFIG_IRQBALANCE for 64-bit x86 ?
Date: Tue, 20 Nov 2007 11:10:26 -0500 [thread overview]
Message-ID: <474306F2.4060502@rtr.ca> (raw)
In-Reply-To: <20071120080243.22725fb3@laptopd505.fenrus.org>
Arjan van de Ven wrote:
> On Tue, 20 Nov 2007 10:52:48 -0500
> Mark Lord <lkml@rtr.ca> wro
>> All of which reminds me of perhaps *the* most important reason to keep
>> core functionality like "IRQ distribution" *inside* the kernel:
>>
>> It has to pass peer review on this mailing list.
>
>
> that's a reason to keep it in the *source*, that's not the same as
..
Ack. :)
> keeping it in ring0 pinning down memory all the time etc ;)
..
I belive it *must* remain pinned in memory to be effective,
because I also know it must run much more frequently than it
currently seems to run, in order to respond to quick changes
in IRQ load.
Eg. a heretofore idle device is suddenly now being used to copy
a DVD-sized file around. It *must* respond quickly to changes
in load like this, or system latencies will suffer badly.
Cheers
next prev parent reply other threads:[~2007-11-20 16:10 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-20 4:12 CONFIG_IRQBALANCE for 64-bit x86 ? Mark Lord
2007-11-20 4:15 ` Ismail Dönmez
2007-11-20 4:17 ` Nick Piggin
2007-11-20 4:29 ` Willy Tarreau
2007-11-20 4:37 ` Adrian Bunk
2007-11-20 5:24 ` Nick Piggin
2007-11-20 5:28 ` H. Peter Anvin
2007-11-20 5:37 ` Arjan van de Ven
2007-11-20 7:37 ` Nick Piggin
2007-11-20 14:47 ` Arjan van de Ven
2007-11-20 15:43 ` Nick Piggin
2007-11-20 19:07 ` Arjan van de Ven
2007-11-20 20:02 ` Mark Lord
2007-11-20 21:58 ` Arjan van de Ven
2007-11-20 23:17 ` Mark Lord
2007-11-22 7:54 ` Nick Piggin
2007-11-23 13:09 ` Ingo Molnar
2007-11-25 10:03 ` Nick Piggin
2007-11-20 15:47 ` Mark Lord
2007-11-20 15:52 ` Mark Lord
2007-11-20 16:02 ` Arjan van de Ven
2007-11-20 16:10 ` Mark Lord [this message]
2007-11-20 18:42 ` Mark Lord
2007-11-20 22:01 ` Ingo Molnar
2007-11-20 23:22 ` Mark Lord
2007-11-20 23:27 ` Ingo Molnar
2007-11-20 23:33 ` H. Peter Anvin
2007-11-20 23:47 ` Ingo Molnar
2007-11-20 23:50 ` H. Peter Anvin
2007-11-21 0:07 ` Ingo Molnar
2007-11-21 0:20 ` H. Peter Anvin
2007-11-21 0:36 ` Ingo Molnar
2007-11-21 0:47 ` H. Peter Anvin
2007-11-21 2:48 ` Jeff Garzik
2007-11-21 2:59 ` H. Peter Anvin
2007-11-20 23:28 ` H. Peter Anvin
2007-11-20 19:17 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2007-11-21 2:22 Walt H
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