From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758621Ab3LFTCC (ORCPT ); Fri, 6 Dec 2013 14:02:02 -0500 Received: from alt-proxy2.mail.unifiedlayer.com ([74.220.193.158]:32946 "HELO alt-proxy2.mail.unifiedlayer.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1756869Ab3LFTCA (ORCPT ); Fri, 6 Dec 2013 14:02:00 -0500 X-Greylist: delayed 399 seconds by postgrey-1.27 at vger.kernel.org; Fri, 06 Dec 2013 14:02:00 EST Date: Fri, 6 Dec 2013 10:56:56 -0800 From: Jesse Barnes To: linux-kernel@vger.kernel.org, Dirk Brandewie Subject: Regression: hang on BYT with new pstate support Message-ID: <20131206105656.4c4b1e5e@jbarnes-desktop> X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Identified-User: {10642:box514.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.161.37.189 authed with jbarnes@virtuousgeek.org} Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The drm-intel tree just updated to 3.13-rc, and I started seeing early hard hangs on my BYT system. I bisected it down to this commit: commit 19e77c28dbf1972305da0dfeb92a62f83df3a91d Author: Dirk Brandewie Date: Mon Oct 21 09:20:35 2013 -0700 intel_pstate: Add Baytrail support Add support for the Baytrail processor. The hangs occur at different times, so unless the get/set functions aren't called until we change the state, the problem may be in the core_set_pstate function instead? Maybe it's not suited to BYT somehow? Thanks, -- Jesse Barnes, Intel Open Source Technology Center