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 CE0193FCB16 for ; Wed, 25 Mar 2026 16:56:30 +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=1774457790; cv=none; b=MGsAZa8AKCD/8zVvjCpfOfzjK3WLSEeYi9L+DKHgh/TdQb+OWHqO4bhw1ldqzc6bKdboHPopnoYPIYERDD9Qr64arj07/qF7XPl3/nnMc1hN+oHcAZfQYuteTw3qfsW5WqMsqg/fGx0NTHlBkMUzH62xCRl1lh2BHKobUxzXBW0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774457790; c=relaxed/simple; bh=smsPoz0FNW4UZU3AzJYWJl4zimPxQ+2orVN3wBHuwsg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=nb+PVC/zbrhuL03f+O5bhnHcfIJ0lqtwknIu15tDmegWX3F7wDj6CLPPOYNUXVKjJNxg9Rr/NvuDPPH9630DHH48sW9qGIdg//Mk+l/IG9xpkhIDzaDjaqE5ZSVbluhml+L/+aHS/dOfbMBGzkoTXzBfzHpuUp1JxhIvJArJdRs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nRtfCnQI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nRtfCnQI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91B01C4CEF7; Wed, 25 Mar 2026 16:56:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774457790; bh=smsPoz0FNW4UZU3AzJYWJl4zimPxQ+2orVN3wBHuwsg=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=nRtfCnQIE0+saXd7kHVMeuHXSL+oTWi0iLCaKFocfup1q9qY2QZz2scvSkGDaqHTK U9KSqjxtdTXm7lWHnTE4u7nupJz9qeqoo7yVTKT1TF5YEyL26afLkKopBPRzndk4bM 5BoBhrqcHJRRDYJGBErArL2pIu423NjDFJ6X+3Q2nnuYqkUI8rztC9NtRaj/o9SABm h7mBWY2I8M0OulEow/JvDQuVOxct6w7SI9FspKtbWZShMcToGwb5j7S6aF/1E2V8x4 czCM7rUt2K2tyY4NzB3s3bTHD7FtjwArLsHSaxaRiF8VEA9mOx7/LiOb3GdhkKE3sy Cr57h8xAVsEmA== From: Thomas Gleixner To: Petr Mladek , Calvin Owens Cc: linux-kernel@vger.kernel.org, arighi@nvidia.com, yaozhenguo1@gmail.com, tj@kernel.org, feng.tang@linux.alibaba.com, lirongqing@baidu.com, realwujing@gmail.com, hu.shengming@zte.com.cn, dianders@chromium.org, joel.granados@kernel.org, Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Frederic Weisbecker , Anna-Maria Behnsen Subject: Re: [BUG] Random hard lockup with userspace %ip on 7.0-rc5 In-Reply-To: References: Date: Wed, 25 Mar 2026 17:56:26 +0100 Message-ID: <87v7ejetl1.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Wed, Mar 25 2026 at 10:03, Petr Mladek wrote: > Adding scheduler and NOHZ people into Cc. Hardlockup in userspace with > interrupts enabled is strange indeed. Plus, there is some nohz-related > function on stack... That's a leftover from a previous syscall and ixgbe_poll is from the most recent soft interrupt handling. Nothing to see here. > On Tue 2026-03-24 16:32:09, Calvin Owens wrote: >> Hi all, >> >> I hit the below hard lockup while building kernels a couple days ago. I >> haven't been able to reproduce it again. >> >> It's clearly not actually a hard lockup, the NMI fired while %ip was in >> userspace with irqs enabled: Yeah. Doesn't make any sense at all. Does not ring any bell. Thanks, tglx