From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Re: Bad sky2 interrupt handling? Date: Thu, 16 Jul 2009 16:37:27 -0700 Message-ID: <20090716163727.666db0cc@nehalam> References: <20090716162552.7f7b3031@jbarnes-g45> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Jesse Barnes Return-path: Received: from mail.vyatta.com ([76.74.103.46]:40407 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933608AbZGPXhd (ORCPT ); Thu, 16 Jul 2009 19:37:33 -0400 In-Reply-To: <20090716162552.7f7b3031@jbarnes-g45> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, 16 Jul 2009 16:25:52 -0700 Jesse Barnes wrote: > I was debugging what I thought was a graphics driver problem today (some > page flipping code I'm working on was only flipping at about 10Hz > rather than ~60Hz) but it appears it's actually due to a bad > interaction with the Marvell 88E8036 controller on this machine. > > MSI fails on this box (haven't looked too much at why yet), so the i915 > driver shares an interrupt with USB, firewire, sdhci and the NIC. > > Is sky2 the wrong driver to be using here? Or is there some way of > reducing its overhead when (presumably) it doesn't have anything to do? No, that is the right driver. If MSI fails, does the driver still think it can use MSI? --