From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:44874 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932740AbdBPUG2 (ORCPT ); Thu, 16 Feb 2017 15:06:28 -0500 Date: Thu, 16 Feb 2017 21:06:24 +0100 From: Pavel Machek To: Thomas Gleixner Cc: Frederic Weisbecker , Linus Torvalds , wanpeng.li@hotmail.com, Peter Zijlstra , Rik van Riel , "# .39.x" , "linux-pci@vger.kernel.org" , Greg Kroah-Hartman , Alan Stern , Linux Kernel Mailing List , Bjorn Helgaas , USB list Subject: Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot Message-ID: <20170216200624.GA4274@amd> References: <20170215172303.GA15696@amd> <20170215232005.GA7877@amd> <20170216111144.GA12377@amd> <20170216172535.GA7868@amd> <20170216181353.GB4357@lerouge> <20170216183421.GC4357@lerouge> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="82I3+IH0IqGh5yIs" In-Reply-To: Sender: linux-pci-owner@vger.kernel.org List-ID: --82I3+IH0IqGh5yIs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu 2017-02-16 20:34:45, Thomas Gleixner wrote: > On Thu, 16 Feb 2017, Frederic Weisbecker wrote: > > On Thu, Feb 16, 2017 at 10:20:14AM -0800, Linus Torvalds wrote: > > > On Thu, Feb 16, 2017 at 10:13 AM, Frederic Weisbecker > > > wrote: > > > > > > > > I haven't followed the discussion but this patch has a known issue = which is fixed > > > > with: > > > > 7bdb59f1ad474bd7161adc8f923cdef10f2638d1 > > > > "tick/nohz: Fix possible missing clock reprog after tick soft r= estart" > > > > > > > > I hope this fixes your issue. > > >=20 > > > No, Pavel saw the problem with rc8 too, which already has that fix. > > >=20 > > > So I think we'll just need to revert that original patch (and that > > > means that we have to revert the commit you point to as well, since > > > that ->next_tick field was added by the original commit). (I already said that elsewhere, but yes, revert of 7bdb59f1ad474b and 24b91e360ef5 fixes boot problems for me. Hmm, and 24b9 was marked for stable... I don't know how to contact all the stable maintainers, but probably it should not go to stable just yet...)=20 > > Aw too bad, but indeed that late we don't have the choice. >=20 > Hint: Look for CPU hotplug interaction of these patches. I bet something > becomes stale when the CPU goes down and does not get reset when it comes > back online. Hmm, that would explain problems at boot _and_ problems during suspend/resume. Note that this can be used to test the hotplug... cd /sys/devices/system/cpu/cpu1 while true; do echo 0 > online; echo 1 > online; done Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --82I3+IH0IqGh5yIs Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlimBkAACgkQMOfwapXb+vK/3QCaApu8lknsLqlHtEImXiHHb3m4 954AnRP3kQupO/U+6EEgHDProxGsV3iQ =9zlT -----END PGP SIGNATURE----- --82I3+IH0IqGh5yIs--