From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B0C7D1BE874 for ; Thu, 10 Oct 2024 09:07:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728551270; cv=none; b=KLKOX4Bzn7XoDV9BZBJz3nwsVN9BavC+8HgfyX6pRDYgt2bWN6XEXvS7gGaxZzt8g8pVq37qfDiUmVgohUznyTSy/sY7WnByDVvHnMisQSYAtJOkeHxUkHVXbLIUh736PVjjJ0oKLfP56s4+BkSXRHOKSO8ZGaJhczIQCmgi5Fo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728551270; c=relaxed/simple; bh=gYU3Z21Ql5llsq7K+Qeds45nrx/A7a+MRfuKjpzFBHI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=X3ccCUSE8BAgEwhw9pU9tojWi3ZD5ozU/Or/W5W78j4wC9MbDvxsnMy1SK38xt3BunbUbveMzZSza2DnlY16n4Ug5vae08ey3HU4pWUI+K+kVvH7lJdX+lzfKungPd+OCmwRShBtCxx35hhYntbagk7Wzwoq6aWRH5g0EM3MGTM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FgAJ1Q+A; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FgAJ1Q+A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B62CDC4CEC5; Thu, 10 Oct 2024 09:07:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728551270; bh=gYU3Z21Ql5llsq7K+Qeds45nrx/A7a+MRfuKjpzFBHI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FgAJ1Q+Al7Idh+hFz8jjmcSol7vzueitbVQuLM6eZy6bDztu5/Oegwnq2oKPQtgK7 fxiqB/cbSJ9R8YKVTi7HA2LvKWBn8wZqu13vq59q+h8RNQrgVudtdrUW8lSh/mypS4 z/yOz7vg+Ynalyce/rJkvF3SZPVEHwVFl1e6pvgc= Date: Thu, 10 Oct 2024 11:07:46 +0200 From: Greg KH To: Jinpu Wang Cc: stable , Kan Liang , baolu.lu@linux.intel.com, 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 Message-ID: <2024101006-scanner-unboxed-0190@gregkh> References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 :) thanks, greg k-h