From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (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 3F31E38B157; Sat, 10 Oct 2026 02:59:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791601178; cv=none; b=A+O3YdbYh5FGHfT7eWwT18Vh1EaB9lnBr0eUeTupq9WWGf+M3vwDTO/i5Ecn4idrfjAm/mY1KXEBUpPrLGdMIYdpu9rxSBaR9ru7Q2S4epzipISvymM0o/Eco5JtvcaKReJvTGBtsWZJ9bWlwym8jr/G/Nx+2t2Wxnm8rpVDAKo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791601178; c=relaxed/simple; bh=Lmzi9xD+MtFDsvia7u2Hw0Yuu44BmeRtKvAQ5SQT7cY=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=bQzBAfXuemi5vH+Yv3shWtkRTAp7jHKtjz1aZJFUjHaRwxesgzkHEq/r9jUt/2OngZea86RT0jD8rMQReByzRfnUiisZ/DlvolukVuDxOaJCadmX6dsortbQ0nicB15+Aag23Yppa08o9AtccZjl4zGCuk9Jn85dON1JlJb4NC4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ll9asCl7; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Ll9asCl7" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1791601177; x=1823137177; h=date:from:to:cc:subject:message-id:mime-version: in-reply-to; bh=Lmzi9xD+MtFDsvia7u2Hw0Yuu44BmeRtKvAQ5SQT7cY=; b=Ll9asCl7J9FeNzw4ss6mw9sOis9ptCgIt/ckN2vz+/t/l+bgNb+E1kza zOiMIoG52kzx62AwzrzpdjyE3vmU3yGM23vV6GKeiulf3wITwF/0tedvR Fif3uCqUeBu4Sgy3R932Djjwxw6zl8ltzPAg5gtTz0KLiDHBFMx7zpjoV BSmLZ7lsQscWUQmF4HX5UD4+kzEb/SZR19kotWv6UxVJr22JLa8rcnioa nF9dWVKdUgOZmKGBuXkZAWFR57R4i9+5vOq+atPFZMjv92/ak4qapfn59 mWqQrYYmcYsNNcDHzhiiDGdyz70QPj0EMUDh65771yFlmgg/QIhkN7ft0 w==; X-CSE-ConnectionGUID: PV97uAovSDqis5+jX/HGzg== X-CSE-MsgGUID: qNsRusgbSnepU5VygGXvXQ== X-IronPort-AV: E=McAfee;i="6800,10657,11930"; a="297252" X-IronPort-AV: E=Sophos;i="6.27,149,1787036400"; d="scan'208";a="297252" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2026 19:59:36 -0700 X-CSE-ConnectionGUID: D0WT4WvpRAWa+I2cCRGTnA== X-CSE-MsgGUID: 5I+VBCSRRdyWLhvWpsksMw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,149,1787036400"; d="scan'208";a="541414" Received: from ly-workstation.sh.intel.com (HELO ly-workstation) ([10.239.182.64]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2026 19:59:27 -0700 Date: Sat, 10 Oct 2026 10:59:24 +0800 From: kernel test robot To: Luigi Rizzo Cc: oe-lkp@lists.linux.dev, lkp@intel.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Luigi Rizzo , Joerg Roedel , Will Deacon , Robin Murphy , Christoph Hellwig , Marek Szyprowski , Andrew Morton , Vlastimil Babka , David Hildenbrand , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Greg Kroah-Hartman , "Rafael J . Wysocki" , Danilo Krummrich , Jonathan Corbet , Jesper Dangaard Brouer , Ilias Apalodimas , Willem de Bruijn , Kuniyuki Iwashima , Joshua Washington , Harshitha Ramamurthy , Saeed Mahameed , Tariq Toukan , Tony Nguyen , Przemek Kitszel , Alexander Lobakin , Michael Chan , Pavan Chebbi , netdev@vger.kernel.org, driver-core@lists.linux.dev, linux-doc@vger.kernel.org, Luigi Rizzo , yi1.lai@intel.com Subject: Re: [RFC: DMA_PMD 02/22] iommu/dma: add DMA_PMD pool lifecycle and page recycle hook Message-ID: <202610101013.706708d0-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-doc@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: <20261003212241.3432303-3-lrizzo@google.com> Hello, kernel test robot noticed "WARNING:at_kernel/workqueue.c:#alloc_workqueue_va" on: commit: 3311715530328ddf9249e312fa817c89b767fde9 ("[RFC: DMA_PMD 02/22] iommu/dma: add DMA_PMD pool lifecycle and page recycle hook") url: https://github.com/intel-lab-lkp/linux/commits/Luigi-Rizzo/iommu-dma-introduce-CONFIG_DMA_PMD-and-metadata-table/20261003-212220 base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/all/20261003212241.3432303-3-lrizzo@google.com/ patch subject: [RFC: DMA_PMD 02/22] iommu/dma: add DMA_PMD pool lifecycle and page recycle hook in testcase: boot config: x86_64-rhel-9.4-rust compiler: clang-22 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 4 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202610101013.706708d0-lkp@intel.com [ 0.966875][ T1] ------------[ cut here ]------------ [ 0.972831][ T1] workqueue: dma_pmd is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU. [ 0.978823][ T1] WARNING: kernel/workqueue.c:5939 at alloc_workqueue_va+0x75a/0x7c0, CPU#3: swapper/0/1 [ 0.983827][ T1] Modules linked in: [ 0.985221][ T1] CPU: 3 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.3.0-rc5+ #1 PREEMPT(lazy) [ 0.988734][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 0.991819][ T1] RIP: 0010:alloc_workqueue_va (workqueue.c:5938) [ 0.993522][ T1] Code: 00 08 00 00 e8 40 08 f0 ff e9 cb f9 ff ff 0f 0b e9 cd fe ff ff 0f 0b e9 c6 fe ff ff 48 8d 3d 66 07 18 02 49 8d b6 b8 00 00 00 <67> 48 0f b9 3a 41 81 cc 00 01 00 00 e9 75 f9 ff ff 48 8d 3d 57 07 All code ======== 0: 00 08 add %cl,(%rax) 2: 00 00 add %al,(%rax) 4: e8 40 08 f0 ff call 0xfffffffffff00849 9: e9 cb f9 ff ff jmp 0xfffffffffffff9d9 e: 0f 0b ud2 10: e9 cd fe ff ff jmp 0xfffffffffffffee2 15: 0f 0b ud2 17: e9 c6 fe ff ff jmp 0xfffffffffffffee2 1c: 48 8d 3d 66 07 18 02 lea 0x2180766(%rip),%rdi # 0x2180789 23: 49 8d b6 b8 00 00 00 lea 0xb8(%r14),%rsi 2a:* 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 41 81 cc 00 01 00 00 or $0x100,%r12d 36: e9 75 f9 ff ff jmp 0xfffffffffffff9b0 3b: 48 rex.W 3c: 8d .byte 0x8d 3d: 3d .byte 0x3d 3e: 57 push %rdi 3f: 07 (bad) Code starting with the faulting instruction =========================================== 0: 67 48 0f b9 3a ud1 (%edx),%rdi 5: 41 81 cc 00 01 00 00 or $0x100,%r12d c: e9 75 f9 ff ff jmp 0xfffffffffffff986 11: 48 rex.W 12: 8d .byte 0x8d 13: 3d .byte 0x3d 14: 57 push %rdi 15: 07 (bad) [ 0.999820][ T1] RSP: 0000:ffffcb9d00013a90 EFLAGS: 00010246 [ 1.001542][ T1] RAX: 0000000000000000 RBX: ffff8b7380b46400 RCX: 33ebeeb162fc7d00 [ 1.004550][ T1] RDX: 0000000000000007 RSI: ffff8b7380b464b8 RDI: ffffffff8e484980 [ 1.006818][ T1] RBP: 0000000000000000 R08: 00000000646d705f R09: 000000000000000f [ 1.008790][ T1] R10: ffff8b7381cec680 R11: ffffffff8ea6ca80 R12: 0000000000000008 [ 1.011630][ T1] R13: ffffffff8da42c29 R14: ffff8b7380b46400 R15: ffffcb9d00013b10 [ 1.013818][ T1] FS: 0000000000000000(0000) GS:ffff8b7721089000(0000) knlGS:0000000000000000 [ 1.016639][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.018818][ T1] CR2: 0000000000000000 CR3: 00000003e4e20000 CR4: 00000000000406f0 [ 1.021819][ T1] Call Trace: [ 1.022829][ T1] [ 1.023829][ T1] ? iommu_dma_forcedac_setup (dma-iommu.c:?) [ 1.025515][ T1] alloc_workqueue_noprof (workqueue.c:6049) [ 1.026818][ T1] ? blake2s_update (crypto/blake2s.c:131) [ 1.028234][ T1] ? intel_cleanup_irq_remapping (irq_remapping.c:?) [ 1.029818][ T1] dma_pmd_init (iommu/dma-pmd-pool.c:373) [ 1.031195][ T1] do_one_initcall (main.c:1358) [ 1.032833][ T1] ? get_random_u32 (char/random.c:396 char/random.c:541) [ 1.033826][ T1] ? __get_random_u32_below (char/random.c:555) [ 1.036270][ T1] ? alloc_from_new_slab (linux/spinlock.h:425 slub.c:4519) [ 1.037829][ T1] ? refill_objects (slub.c:7424) [ 1.038818][ T1] ? irqentry_exit (linux/irq-entry-common.h:539) [ 1.040264][ T1] ? asm_sysvec_apic_timer_interrupt (x86/include/asm/idtentry.h:674) [ 1.045448][ T1] ? parameq (params.c:91 params.c:99) [ 1.046722][ T1] ? parameq (linux/fortify-string.h:218 params.c:99) [ 1.051786][ T1] ? do_initcall_level (linux/srcutree.h:?) [ 1.054571][ T1] ? parse_args (params.c:153) [ 1.056827][ T1] do_initcall_level (main.c:1420) [ 1.058834][ T1] do_initcalls (main.c:1436) [ 1.060827][ T1] kernel_init_freeable (main.c:1671) [ 1.063560][ T1] ? rest_init (main.c:?) [ 1.065827][ T1] kernel_init (main.c:1561) [ 1.067786][ T1] ret_from_fork (x86/kernel/process.c:158) [ 1.069828][ T1] ? rest_init (main.c:?) [ 1.072821][ T1] ret_from_fork_asm (x86/entry/entry_64.S:245) [ 1.074826][ T1] [ 1.076251][ T1] ---[ end trace 0000000000000000 ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20261010/202610101013.706708d0-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki