From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 CBAC51BDA90 for ; Thu, 10 Oct 2024 14:01:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728568889; cv=none; b=NbTuwrF8LbI/pbT21+L45BChQOl+SLV/j+lDX9OvAXMCSokSZ8UwMuGvz7JFFngHJfk5LyBVT3/37Lz7yOM27By+LSNGtzd9O1PZW0ECkgYRoCVbuFKI1qczWsDMgCMMzzn6aEMd/sMuerou0sr0Y4P3lsefm0vmu6I3anJjS2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728568889; c=relaxed/simple; bh=Zbm+qJJQ0R/QF9HbWCros9cHGg4g9SG4o5soieW3Cs8=; h=Message-ID:Date:MIME-Version:Cc:Subject:To:References:From: In-Reply-To:Content-Type; b=IHuiRMsujp3bBuvWiSL2ui9RstA2+cx2jZcJApUyI5AKQEwJEiN5Gzc+KiM3PGHm3iPTlqn1muHfDQf59lGjka7IDF/Oa8GP0KAx6Sh3Sbw3Mq9G2Y52UKXdcTdZD1hJ8zpi/XtqxHAfEmzCxXcK86spduzU/m3yc+kvXTpxbpc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=C/52gZ+O; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="C/52gZ+O" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728568887; x=1760104887; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=Zbm+qJJQ0R/QF9HbWCros9cHGg4g9SG4o5soieW3Cs8=; b=C/52gZ+OrqhD6PG5oNyIULIdokrHc8W5i1/hX9ZP9Ojc7SUSIMboq3vv py1EIksmp6IZSoTEAOvnO7w7W2uk137j5y0mqWVY8I+1NS98YvswSX06l IFcFQQzD9vW0JRCmawHKqshsF+pBk0oIKAghCTq+NZCk4MrhgOTbmntKw +/9DeXiYHJINSIGARXC5yNej0bsAGURDXEdf3BSdB1r/tYpCYfohZYtx3 ZOH4INn0ldVxBf4g/NvQpmo8cLLbfgfPAkRq0abWBK+2WezculgFVEqEP DgjNUh5jfmoPLWH6kRdGmHmTso4NtEqozZa2VWtpZHdCcZqizrRHjCAL2 A==; X-CSE-ConnectionGUID: l67qa5CpSZiFrsQypBoiLg== X-CSE-MsgGUID: bsKP1lWdQtunN7y5NMqEeQ== X-IronPort-AV: E=McAfee;i="6700,10204,11220"; a="39294269" X-IronPort-AV: E=Sophos;i="6.11,193,1725346800"; d="scan'208";a="39294269" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2024 07:00:38 -0700 X-CSE-ConnectionGUID: GNCH3032S/aRj9wYpsoRfQ== X-CSE-MsgGUID: 85AxBxU4SRG4yJXvH7a47Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,193,1725346800"; d="scan'208";a="76911442" Received: from blu2-mobl.ccr.corp.intel.com (HELO [10.125.248.220]) ([10.125.248.220]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Oct 2024 07:00:24 -0700 Message-ID: <9539f133-2cdb-4aa8-8eac-ddf649819d98@linux.intel.com> Date: Thu, 10 Oct 2024 22:00:21 +0800 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: baolu.lu@linux.intel.com, stable , jroedel@suse.de, Sasha Levin , x86@kernel.org Subject: Re: [regression]Boot Hang on Kernel 6.1.83+ with Dell PowerEdge R770 and Intel Xeon 6710E To: "Liang, Kan" , Jinpu Wang , Greg KH References: <2024101006-scanner-unboxed-0190@gregkh> <2024101000-duplex-justify-97e6@gregkh> <635be050-f0ab-4242-ac79-db67d561dae9@linux.intel.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <635be050-f0ab-4242-ac79-db67d561dae9@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 2024/10/10 21:25, Liang, Kan wrote: > On 2024-10-10 6:10 a.m., Jinpu Wang wrote: >> Hi Greg, >> >> >> On Thu, Oct 10, 2024 at 11:31 AM Greg KH wrote: >>> On Thu, Oct 10, 2024 at 11:13:42AM +0200, Jinpu Wang wrote: >>>> Hi Greg, >>>> >>>> On Thu, Oct 10, 2024 at 11:07 AM Greg KH wrote: >>>>> On Thu, Oct 10, 2024 at 09:31:37AM +0200, Jinpu Wang wrote: >>>>>> Hello all, >>>>>> >>>>>> We are experiencing a boot hang issue when booting kernel version >>>>>> 6.1.83+ on a Dell Inc. PowerEdge R770 equipped with an Intel Xeon >>>>>> 6710E processor. After extensive testing and use of `git bisect`, we >>>>>> have traced the issue to commit: >>>>>> >>>>>> `586e19c88a0c ("iommu/vt-d: Retrieve IOMMU perfmon capability information")` >>>>>> >>>>>> This commit appears to be part of a larger patchset, which can be found here: >>>>>> [Patchset on lore.kernel.org](https://lore.kernel.org/ >>>>>> lkml/7c4b3e4e-1c5d-04f1-1891-84f686c94736@linux.intel.com/T/) >>>>>> >>>>>> We attempted to boot with the `intel_iommu=off` option, but the system >>>>>> hangs in the same manner. However, the system boots successfully after >>>>>> disabling `CONFIG_INTEL_IOMMU_PERF_EVENTS`. >>>>> Is there any error messages? Does the latest 6.6.y tree work properly? >>>>> If so, why not just use that, no new hardware should be using older >>>>> kernel trees anyway 🙂 >>>> No error, just hang, I've removed "quiet" and added "debug". >>>> Yes, the latest 6.6.y tree works for this, but there are other >>>> problems/dependency we have to solve. >>> Ok, that implies that we need to add some other patch to 6.1.y, OR we >>> can revert it from 6.1.y. Let me know what you think is the better >>> thing to do. >>> >> I think better to revert both: >> 8c91a4bfc7f8 ("iommu: Fix compilation without CONFIG_IOMMU_INTEL") > I'm not sure about this one. May need baolu's comments. I can't find this commit in the mainline kernel. I guess it fixes a compilation issue in the stable tree? If so, it depends on whether the issue is still there. Thanks, baolu