From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 539DB13D53E; Mon, 9 Sep 2024 10:56:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725879388; cv=none; b=JnrDoF0I6+arugR5eSvnzqrXfbaBt+I+dcvemNa9N/3tY7VwwPwSgp0ka+PSTZUSni0wY7aOl6W5g8Fgx29zhhpBqxYCsCO3wT6Mzc/vMN9+091Fvu3TraUervi2/QdcBwGfXqNCuHQ5A59P8jm/akhIr9qQZaRK6fLRt6sEHLo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725879388; c=relaxed/simple; bh=c/bDx71bLVyRfv5navU3Ek/BOIYCeWQ8co8Smtaway8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DB/2htT4ktMQ08XSAGhTV3p377F1SY5T4UWrkmelo3s++fxYpu3QEq8OLxyo4DpgNZi7/ssxqjrYy20BMYGZ9DTYIMMCVd3hJ/gUeOGhVQSs+5acOyayfl0awu6vh6tnAjtfj7hOHaM/B9gRHQXyV3019dbxrhdVff87y1YIVd4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=CCbD5EXW; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="CCbD5EXW" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=ewHE0AbY/FuLNz/wbi0i4ea1GwIaCq/CzYyaTShAYBU=; b=CCbD5EXWpbBEILG8ywBisRYXP9 GWmJqxJlLfM6SJ5keww7rA0hqya64aDeusIg2FCj+DSlewtW9WRt9xi8ihH0dGG1pUW1hXFzipXoi 6yQ4qj2fOf5soUhtiGHRcSpm9t/X11u0yT/m+hORTO57/izeP5Dk5aw7tKmA95azqHSaeXpOKKcCC FMbY7UAS9RFNBxjA8Nx83tt8BWNPMSecVibAr3ZZGVQl6npCvbZ8JxRJz/O8hRcTgVxEsa4Qv+jAk YWLsKjIVCB8/yGxIsvWJN5Lhw+2SUixNG/hzd4mOXOKsceMaDbzMZ6v+s/n/9YsTlLidba98jZaK5 dZWRFIKw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1snc4E-0000000Boy0-2ydr; Mon, 09 Sep 2024 10:56:24 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 1A4BA30047C; Mon, 9 Sep 2024 12:56:23 +0200 (CEST) Date: Mon, 9 Sep 2024 12:56:23 +0200 From: Peter Zijlstra To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, x86@kernel.org, "Darrick J. Wong" , Thomas Gleixner Subject: Re: [tip:locking/urgent] [jump_label] de752774f3: kernel_BUG_at_arch/x86/kernel/jump_label.c Message-ID: <20240909105623.GH4928@noisy.programming.kicks-ass.net> References: <202409082005.393050e2-oliver.sang@intel.com> <20240909091531.GA4723@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@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: <20240909091531.GA4723@noisy.programming.kicks-ass.net> On Mon, Sep 09, 2024 at 11:15:31AM +0200, Peter Zijlstra wrote: > On Sun, Sep 08, 2024 at 09:06:55PM +0800, kernel test robot wrote: > > > > > > Hello, > > > > kernel test robot noticed "kernel_BUG_at_arch/x86/kernel/jump_label.c" on: > > > > commit: de752774f38bb766941ed1bf910ba5a9f6cc6bf7 ("jump_label: Fix static_key_slow_dec() yet again") > > https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git locking/urgent > > > > in testcase: boot > > > > compiler: clang-18 > > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > > > > The kernel config and materials to reproduce are available at: > > https://download.01.org/0day-ci/archive/20240908/202409082005.393050e2-oliver.sang@intel.com > > So the whole thing actually boots and works on my real machine, so I had > to resort to using this qemu nonsense, as such I did as instructed in > the reproduce file. > > I build the thing using clang-17 (for some reason debian is shitting > itself trying to install clang-18 on this machine and I don't want to > spend the day fighting that). > > Except, once I do: > > bin/lkp qemu -k /usr/src/linux-2.6/tmp-build/arch/x86/boot/bzImage -m /usr/src/linux-2.6/tmp-build/mod/modules.cgz job-script > > The whole thing grinds to a halt like so: Since I'm not able to reproduce, could you please run the thing against: git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/urgent and see what that does?