From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dan.rpsys.net (5751f4a1.skybroadband.com [87.81.244.161]) by mail.openembedded.org (Postfix) with ESMTP id 70A986FF73 for ; Wed, 13 Dec 2017 14:14:12 +0000 (UTC) Received: from hex ([192.168.3.34]) (authenticated bits=0) by dan.rpsys.net (8.15.2/8.15.2/Debian-3) with ESMTPSA id vBDEE8WY008164 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 13 Dec 2017 14:14:09 GMT Message-ID: <1513174448.16507.8.camel@linuxfoundation.org> From: Richard Purdie To: Bruce Ashfield Date: Wed, 13 Dec 2017 14:14:08 +0000 In-Reply-To: <85f7c521-01c4-7870-0f57-7ca217fce8e3@windriver.com> References: <1513168490.19417.183.camel@linuxfoundation.org> <694b540b-1fc8-0388-5419-01c6e3f100c6@windriver.com> <1513173904.16507.1.camel@linuxfoundation.org> <85f7c521-01c4-7870-0f57-7ca217fce8e3@windriver.com> X-Mailer: Evolution 3.18.5.2-0ubuntu3.2 Mime-Version: 1.0 X-Virus-Scanned: clamav-milter 0.99.2 at dan X-Virus-Status: Clean Cc: "Lock, Joshua" , openembedded-core Subject: Re: Fix for the APIC hangs in qemux86-64 X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Dec 2017 14:14:12 -0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit On Wed, 2017-12-13 at 09:07 -0500, Bruce Ashfield wrote: > On 12/13/2017 09:05 AM, Richard Purdie wrote: > > > > On Wed, 2017-12-13 at 08:38 -0500, Bruce Ashfield wrote: > > > > > > On 12/13/2017 07:34 AM, Richard Purdie wrote: > > > > > > > > > > > > Hi Bruce, > > > > > > > > https://bugzilla.yoctoproject.org/show_bug.cgi?id=12301 > > > > > > > > We've root caused the hangs we're seeing in qemux86-64 on our > > > > autobuilder workers. We've identified a commit on 4.15-rc3 > > > > which > > > > fixes > > > > the issue but backporting it to the autobuilder's host kernels > > > > will > > > > be > > > > a pain. > > > > > > > > As a workaround I'd like to enable x2apic on qemux86-64. Since > > > > that > > > > works via MSRs it avoids the problem. > > > > > > > > Would it be a big issue to set CONFIG_X86_X2APIC=y for qemux86- > > > > 64? > > > Nope. No big deal at all. I've used the same config i the past > > > when doing work with rt-KVM, so I know it well. > > > > > > I'll prep a commit, and send it along as part of a rebased set > > > of kernel patches. > > Thanks, much appreciated. > > > > Did we get to the bottom of the 4.12 selftest failures? > > > Not yet no. I was distracted for a day, but need to learn how > to run them myself. I was able to log in via serial in my normal > boot flow, so that didn't get me anywhere. > > Is the selftest HOWO in the yocto docs ? I'll google it up this > morning. No HOWTO but I did give you the command. In a poky checkout run: oe-selftest -r runqemu.RunqemuTests.test_boot_deploy which runs a single test that fails (setup DL_DIR/SSTATE_MIRRORS first to speed it up a bit). It may tell you to clear SANITY_TESTED_DISTROS, I think it auto adds meta-selftest now. You may also need to set DISPLAY to something (e.g. a dummy vncserver). Not sure what is different about the serial qemu is using verses your own tests... > > We may also need to backport the defconfig change back to the older > > releases so we don't get the hangs in those builds either... > Not a problem either. I'll prepare several.>  Thanks! Cheers, Richard >