From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Bad sky2 interrupt handling? Date: Thu, 16 Jul 2009 16:25:52 -0700 Message-ID: <20090716162552.7f7b3031@jbarnes-g45> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit To: Stephen Hemminger , netdev@vger.kernel.org Return-path: Received: from outbound-mail-148.bluehost.com ([67.222.38.38]:54487 "HELO outbound-mail-148.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S933574AbZGPXce (ORCPT ); Thu, 16 Jul 2009 19:32:34 -0400 Sender: netdev-owner@vger.kernel.org List-ID: 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? -- Jesse Barnes, Intel Open Source Technology Center