From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC9A872 for ; Thu, 25 Nov 2021 01:07:17 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10178"; a="215438369" X-IronPort-AV: E=Sophos;i="5.87,261,1631602800"; d="scan'208";a="215438369" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2021 17:07:16 -0800 X-IronPort-AV: E=Sophos;i="5.87,261,1631602800"; d="scan'208";a="510088158" Received: from askirtik-mobl1.amr.corp.intel.com (HELO vcostago-mobl3) ([10.212.223.232]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2021 17:07:16 -0800 From: Vinicius Costa Gomes To: Jakub Kicinski , Stefan Dietrich Cc: Greg KH , netdev@vger.kernel.org, stable@vger.kernel.org, regressions@lists.linux.dev, Dvora Fuxbrumer , Tony Nguyen , intel-wired-lan@lists.osuosl.org Subject: Re: [REGRESSION] Kernel 5.15 reboots / freezes upon ifup/ifdown In-Reply-To: <20211124153449.72c9cfcd@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> References: <924175a188159f4e03bd69908a91e606b574139b.camel@gmx.de> <8119066974f099aa11f08a4dad3653ac0ba32cd6.camel@gmx.de> <20211124153449.72c9cfcd@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> Date: Wed, 24 Nov 2021 17:07:16 -0800 Message-ID: <87a6htm4aj.fsf@intel.com> Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Hi Stefan, Jakub Kicinski writes: > On Wed, 24 Nov 2021 18:20:40 +0100 Stefan Dietrich wrote: >> Hi all, >> >> six exciting hours and a lot of learning later, here it is. >> Symptomatically, the critical commit appears for me between 5.14.21- >> 051421-generic and 5.15.0-051500rc2-generic - I did not find an amd64 >> build for rc1. >> >> Please see the git-bisect output below and let me know how I may >> further assist in debugging! > > Well, let's CC those involved, shall we? :) > > Thanks for working thru the bisection! > >> a90ec84837325df4b9a6798c2cc0df202b5680bd is the first bad commit >> commit a90ec84837325df4b9a6798c2cc0df202b5680bd >> Author: Vinicius Costa Gomes >> Date: Mon Jul 26 20:36:57 2021 -0700 >> >> igc: Add support for PTP getcrosststamp() Oh! That's interesting. Can you try disabling CONFIG_PCIE_PTM in your kernel config? If it works, then it's a point in favor that this commit is indeed the problematic one. I am still trying to think of what could be causing the lockup you are seeing. Cheers, -- Vinicius