From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758058AbcCCQkn (ORCPT ); Thu, 3 Mar 2016 11:40:43 -0500 Received: from smtp-out4.iol.cz ([194.228.2.92]:56828 "EHLO smtp-out4.iol.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757871AbcCCQkl (ORCPT ); Thu, 3 Mar 2016 11:40:41 -0500 X-Greylist: delayed 1450 seconds by postgrey-1.27 at vger.kernel.org; Thu, 03 Mar 2016 11:40:41 EST X-SBRS: None X-RECVLIST: MTA-OUT-IOL X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2CpBAAXY9hW/0Kq0FNdhAxtvCMhh1wQAQEBAQEBAWQnhQACUzs+AUuIHQqfBJ8VBI9Yg24FlxyBG4Q/iAIHYYg3hV+OTTcrgTYMAYIiOy4BiSEBAQE X-IPAS-Result: A2CpBAAXY9hW/0Kq0FNdhAxtvCMhh1wQAQEBAQEBAWQnhQACUzs+AUuIHQqfBJ8VBI9Yg24FlxyBG4Q/iAIHYYg3hV+OTTcrgTYMAYIiOy4BiSEBAQE X-IronPort-AV: E=Sophos;i="5.22,532,1449529200"; d="scan'208";a="27807817" To: linux-kernel@vger.kernel.org Subject: Kernel stability on baytrail machines X-PHP-Originating-Script: 0:rcube.php MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 03 Mar 2016 17:16:27 +0100 From: Michal Feix Message-ID: <606d9b223f3c12775d108b98c4df72ae@feix.cz> User-Agent: Roundcube Webmail/1.0.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello everyone, aprox. 6 months ago I started facing random freezes on my baytrail based computers I manage. It took me a while before I found a bug report in freedesktop bugzilla named "complete freeze after: drm/i915/vlv: WA for Turbo and RC6 to work together" - https://bugs.freedesktop.org/show_bug.cgi?id=88012. It took a few more months for this bug to escalate into MAJOR importance and was later moved into kernel bugzilla as "intel_idle.max_cstate=1 required on baytrail to prevent crashes" - https://bugzilla.kernel.org/show_bug.cgi?id=109051. Based on the ammount of comments in both bugtickets and probably connected observations on different linux distros forums, this seems to be a showstopper on mainstream Baytrail based machines for many users. I'm trying to understand, how visible (and thus important) is this instability across baytrail machines on linux kernel across population. I do feel that the importance of the mentioned bug is currently underestimated. Can anyone here give a note, how much current linux kernel is supposed to be stable on general baytrail machines? Cheers, -- Michael