From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751222AbdBWOXL (ORCPT ); Thu, 23 Feb 2017 09:23:11 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:52070 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750828AbdBWOXD (ORCPT ); Thu, 23 Feb 2017 09:23:03 -0500 Date: Thu, 23 Feb 2017 15:22:59 +0100 From: Pavel Machek To: Frederic Weisbecker Cc: Thomas Gleixner , wanpeng.li@hotmail.com, Peter Zijlstra , Rik van Riel , Linux Kernel Mailing List Subject: Re: next_tick hang was Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot Message-ID: <20170223142259.GA12511@amd> References: <20170216183421.GC4357@lerouge> <20170217140449.GA4521@lerouge> <20170217170508.GA20884@amd> <20170217184327.GD4521@lerouge> <20170218093917.GA4722@amd> <20170218102339.GA3544@amd> <20170222030857.GB2780@lerouge> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="3MwIy2ne0vdjdPXF" Content-Disposition: inline In-Reply-To: <20170222030857.GB2780@lerouge> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --3MwIy2ne0vdjdPXF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed 2017-02-22 04:08:58, Frederic Weisbecker wrote: > On Sat, Feb 18, 2017 at 11:23:39AM +0100, Pavel Machek wrote: > > On Sat 2017-02-18 10:39:17, Pavel Machek wrote: > > > Hi! > > >=20 > > > [I droped some CCs here, you may want to check the CC list]. > > >=20 > > > > > These are different bugs. > > > > >=20 > > > > > On x60, I see failures doing hotplug/unplug in a loop, or lot of > > > > > suspends. Someone seen it in v4.8-stable etc. Old bug. Rare to hi= t. > > > > >=20 > > > > > Desktop machine was failing to boot, and had some fun with > > > > > suspend/resume too. Boot hang was reproducible with right > > > > > procedure. (Hard poweroff, cold boot.). That one was introduced in > > > > > 4.10-rc cycle. > > > >=20 > > > > Pavel, is there any chance you could apply this patch on top of lat= est linus tree > > > > and send me your resulting dmesg log? This has the two reverted pat= ches plus some > > > > debugging code. The amount of printk shouldn't be too big, I tested= it home without > > > > issue. > > > >=20 > > > > If you can't manage to dump the dmesg, please try to take a picture= of your screen > > > > so that I can see the last messages starting with "NEXT_TICK_READ". > > > >=20 > > > > Thanks! > > >=20 > > > I guess I can. But I'll only have one 80x25 screen to look at... > >=20 > > Ok, here it is. >=20 > Thanks, I haven't been able to deduce much though, except that the pendin= g timer on CPU 0 > looks quite far away. >=20 > Could you please add "initcall_debug" in your kernel parameters to identi= fy if we are blocking in > a specific initcall? If so it should tell us which one. Please see Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot thread. Hang was traced down to the USB handoff code. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --3MwIy2ne0vdjdPXF Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAliu8EMACgkQMOfwapXb+vKMtwCeOKYJjrpcHB4ZnkWRbL0L7SAQ lqUAnjfgUtOXotjmhmHQUlXObHF8zq3I =eRQG -----END PGP SIGNATURE----- --3MwIy2ne0vdjdPXF--