From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id A4335DDE01 for ; Mon, 27 Oct 2008 13:49:47 +1100 (EST) Subject: Re: [PATCH] genirq: Set initial default irq affinity to just CPU0 From: Benjamin Herrenschmidt To: Kevin Diggs In-Reply-To: <490527CF.80908@hypersurf.com> References: <1224863858-7933-1-git-send-email-galak@kernel.crashing.org> <20081024.161813.193686281.davem@davemloft.net> <1224970389.7654.473.camel@pasglop> <4903A37A.50607@hypersurf.com> <1225003723.7654.490.camel@pasglop> <490527CF.80908@hypersurf.com> Content-Type: text/plain Date: Mon, 27 Oct 2008 13:49:36 +1100 Message-Id: <1225075776.8004.0.camel@pasglop> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org Reply-To: benh@kernel.crashing.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sun, 2008-10-26 at 18:30 -0800, Kevin Diggs wrote: > The reason I asked is that I seem to remember a config option that > would restrict the irqs to cpu 0? Help suggested it was needed for > certain PowerMacs. Didn't provide any help as to which ones. My GigE > currently spreads them between the two. I have not noticed any > additional holes in the space time contiuum. Yeah, a long time ago we had unexplained lockups when spreading interrupts, hence the config option. I think it's all been fixed since then. Ben.