From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga14.intel.com (mga14.intel.com [143.182.124.37]) by mx1.pokylinux.org (Postfix) with ESMTP id 3C92C4C80188 for ; Wed, 27 Apr 2011 17:19:58 -0500 (CDT) Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga102.ch.intel.com with ESMTP; 27 Apr 2011 15:19:57 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.64,276,1301900400"; d="scan'208";a="426707203" Received: from unknown (HELO [10.255.13.11]) ([10.255.13.11]) by azsmga001.ch.intel.com with ESMTP; 27 Apr 2011 15:19:46 -0700 Message-ID: <4DB8967F.2020409@linux.intel.com> Date: Wed, 27 Apr 2011 15:19:43 -0700 From: Darren Hart User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110223 Lightning/1.0b2 Thunderbird/3.1.8 MIME-Version: 1.0 To: Bruce Ashfield References: <1303933921-10310-1-git-send-email-dvhart@linux.intel.com> <4DB875A5.30501@windriver.com> In-Reply-To: <4DB875A5.30501@windriver.com> Cc: poky@yoctoproject.org Subject: Re: [PATCH 0/3] n450: add 2.6.37 kernel recipe and SMP support X-BeenThere: poky@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Poky build system developer discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Apr 2011 22:19:58 -0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 04/27/2011 12:59 PM, Bruce Ashfield wrote: > On 11-04-27 03:51 PM, Darren Hart wrote: >> The atom-pc BSP which the n450 is based on was originally intended for single >> CPU. The n450 is a single-core hyperthreaded CPU, so CONFIG_SMP and >> CONFIG_SCHED_SMT are required to access the second hardware thread. These >> patches add the newly created cfg/smp.scc config fragment to the recipe. >> >> The current n450 BSP uses linux-yocto-stable (2.6.34), which was an oversight. >> These patches add support for the linux-yocto (2.6.37) recipe and separately >> enable that as the default. I have tested the linux-yocto kernel and confirmed >> it boots, has functional networking, and can suspend and resume. >> >> After some discussion with Tom, it seems that there is adequate testing planned >> for the point release to allow for moving to the linux-yocto recipe. Note that >> fixing bug 1010 makes significant changes to whichever kernel we choose > > Was this supposed to read "does not make significant changes" ? Looks > pretty minor to me (outside of jumping kernels :). Actually no. There was some concern about jumping kernels and I just want to point out that enabling SMP changes the way a number of things work within the kernel, so some retesting might be necessary anyway. If so, then the jump to 2.6.37 isn't as big of a deal. > >> to use. Before I commit to meta-intel however, I would like the input of the QA >> team. >> >> How much testing was planned for the n450 originally? How much additional >> testing would be required if we make the new kernel the default? > > For what its worth our other x86 testing should have largely covered > this. If we can't count on the transitive value of our testing using > the common fragments/drivers/arch, then we don't have much to count on. > > I see little risk in this myself, and would support the default changing > to linux-yocto in 1.0.1. Excellent point Bruce! > > Acked-by: Bruce Ashfield > >> >> Thanks, >> >> Darren Hart >> > -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel