From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by mx1.pokylinux.org (Postfix) with ESMTP id DEBD04C805BB for ; Wed, 16 Mar 2011 22:23:03 -0500 (CDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 16 Mar 2011 20:23:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.63,197,1299484800"; d="scan'208";a="721029588" Received: from unknown (HELO [10.255.12.146]) ([10.255.12.146]) by orsmga001.jf.intel.com with ESMTP; 16 Mar 2011 20:23:03 -0700 Message-ID: <4D817E7A.9060809@linux.intel.com> Date: Wed, 16 Mar 2011 20:22:34 -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: Yu Ke References: <4D812FD5.5050504@linux.intel.com> <1300320837.30423.1924.camel@rex> <20110317021334.GA26323@kyu3-hedt> In-Reply-To: <20110317021334.GA26323@kyu3-hedt> Cc: "poky@yoctoproject.org" Subject: Re: [PATCH A or B] Fix for bug #853 - matchbox-panel segfaults, X becomes unusable 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: Thu, 17 Mar 2011 03:23:04 -0000 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 03/16/2011 07:13 PM, Yu Ke wrote: > On Mar 17, 00:13, Richard Purdie wrote: >> On Wed, 2011-03-16 at 14:47 -0700, Darren Hart wrote: >>> The root cause of the matchbox-panel segfault is the same as for >>> the previous two bugs addressing the same issue: >>> >>> o Bug 224 - [Netbook/emenlow] matchbox-panel segfault after X >>> startup o Bug 738 - matchbox-panel segfault after X startup >>> >>> There apparently is a bug in gcc which results in the omission of >>> some code leading to the segfault on core2. The following flags >>> resolve the problem. >>> >>> FULL_OPTIMIZATION = "-fexpensive-optimizations -frename-registers >>> -O2 -ggdb -feliminate-unused-debug-types" >>> >>> We can continue to patch each new machine's gtk+ recipe that is >>> based on atom-pc.conf, or we can just add the above to >>> tune-atom.conf. I've tested both on both the n450 and a Toshiba >>> NB305 netbook, and each solution is effective. >>> >>> Chaging it in tune-atom.conf likely fixes other bugs we either >>> haven't solved yet or simply haven't hit. It is also much more >>> invasive, and we may not be willing to accept that this close to >>> 1.0. The patches follow, and we can include one or the other. >>> >>> Preferences? >> >> I'm in favour of C which is to add this to tune-atom.inc: >> >> FULL_OPTIMIZATION_pn-gtk+ = "-fexpensive-optimizations >> -frename-registers -O2 -ggdb -feliminate-unused-debug-types" >> >> :) >> >> Cheers, >> >> Richard > > I have an option D :) > > i.e. in gtk+_2.22.1.bb, add: FULL_OPTIMIZATION_core2= > "-fexpensive-optimizations -frename-registers -O2 -ggdb > -feliminate-unused-debug-types" > > because this issue is caused by gcc optimization for core2 arch, so > in theory, all machine with core2 arch setting will be affected, no > only limited to atom machine There are apparently at least 4 ways to do this :-) RP has merged his change (version C) to bernard and I've tested it on atom-pc. I've removed the existing changes from the original gtk+ recipe and the various bbappends in meta-intel. I'm testing on n450 now. If that works I'll send the patch against gtk+ and commit those to bernard and master for meta-intel. -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel