From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.175.65.9 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793710457; b=hHZ7DZ62XlAG2vcE+7lEF2UjMCuJYxhHvKuyKx1KVZ+zfc1lNUqBE/EODrbkPBnChAuZ 4dS+zt/tJAsbfFI/LOl2kYvW2zzceEk+Guim5GbXlFkYTlGZang5hHDjijLdfHEQ7P6U/ /OV38zGFtza7h+JV/8+GxNKwlFIaXBzGyDvlhb3SRUC8+ufpMvdzNtYq7TX3Gb7wKevSe REiC7RZ2MCtLKfLY9H0u+qZjZnMRvDXcmf4WYnFxDOjX5mALiLF5T3bplibOXKKxvatQZ 0Zg6QZ6SGP59hAfIEqJj+114DDyo8S59KM1zM3k5W99e6Vh0i8DCRn5TJmrJkb7laZA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793710457; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:X-IronPort-AV:Received:X-CSE-ConnectionGUID: X-CSE-MsgGUID:X-ExtLoop1:X-IronPort-AV:Received:Received:Date:From:To: Cc:Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=T84aiAJqcr9eIc+RMHEdRg8f3K7zIQJ4MBqlwh+rBPc=; b=1cKeOjacCyOG9Tce5+Oohvs/upubk8ETiszWAeSOVoODQGoxRCms+ICyuo7AhFeVJlln nhsDq0v48OSBE9EmG260kQ8mmnz1EVeAA3qvTCBTICG0ReWR28HCsFeRFjDXoWGEeUXZM 9PQQ7WevTC5eajnZHWc8xEg5Mt5yvJAvLxAsVsv+bTnR5P/E5IZi9rj4kqVCF2bP5CLlL nobvTZYDO3dWQYtkRJNhcFonlWq8gvKxRsOmcjt+/HDiYYzyhmVPn0KP0vZ9hhnnNVbbD hyG2S4WNOhgTNJ0l7HdiT/Dykd9XeoaAsREuoxFVVRnaTn0kTxVPxzm+2YsW7i69Zlw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=mMsegJ5d; arc=none smtp.remote-ip=198.175.65.9 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BE8BA606A32F; Tue, 3 Nov 2026 12:54:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org BE8BA606A32F 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, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=mMsegJ5d DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1793710454; x=1825246454; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=IhRkmlNFW8wvqh1/ycRf3KZ3oTStQ6uioF6qvXYIdxs=; b=mMsegJ5dKg6nPnD0khk1DwMuw8ekVkHkKZAm3a9AvqaqWnMn8udLFEdq CW51kiwgk0aMyd9r1rpBJqHaOdQKD5ddqDJhAjOLIA+3+1UrBzjqI+5K0 iKfPbmsoaUALpZQaV6EPs2+1mhRDbY6C5Cj+kokYkXsqrWEms5RSBeNvk 2f0PGyYWQnzq1Oh4obBpGkrp4IYogNTD75pSyTSVLrOjO0t7wVXpNRxoA iJgt7zubVj0zJd9asR7v4EQ8jeopApDqDw3ngtsxoHVOlBsJ268ATqvNM WIwrUZc0zIobaw+jLsfKAWtEmS1dQ1bvHJsov7ENVnwM73hwoih9E7BUf w==; X-CSE-ConnectionGUID: 3LCnV0BxRqG3LKfyLylI7A== X-CSE-MsgGUID: v8ont5CzReat21RRZ1HWqg== X-IronPort-AV: E=McAfee;i="6800,10657,11954"; a="2323234" X-IronPort-AV: E=Sophos;i="6.27,193,1787036400"; d="scan'208";a="2323234" Received: from fmviesa011.fm.intel.com ([10.60.135.151]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Nov 2026 04:54:13 -0800 X-CSE-ConnectionGUID: bIrfVphKRsiEpMbkrvetPA== X-CSE-MsgGUID: 3fvg2CqPSWirao/zO/h4zw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,193,1787036400"; d="scan'208";a="8203943" Received: from lkp-server01.sh.intel.com (HELO 0caa9d2d175c) ([10.239.97.150]) by fmviesa011.fm.intel.com with ESMTP; 03 Nov 2026 04:54:07 -0800 Received: from kbuild by 0caa9d2d175c with local (Exim 4.98.2) (envelope-from ) id 1xOE1a-00000000ik4-3PiJ; Tue, 03 Nov 2026 12:54:02 +0000 Date: Tue, 3 Nov 2026 20:53:34 +0800 From: kernel test robot To: Matthew Ruffell , Waiman Long , Frederic Weisbecker , Tejun Heo , Peter Zijlstra , Ingo Molnar , Andrew Morton , David Hildenbrand Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , Caron Wills , Ridong Chen , Johannes Weiner , Michal =?iso-8859-1?Q?Koutn=FD?= , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Subject: Re: [PATCH 3/6] mm/folio, mm/mlock: Don't batch folios in per-CPU LRU caches on isolated CPUs Message-ID: <202611032053.I3Ud8d11-lkp@intel.com> References: <20261103075940.110308-4-matthew.ruffell@canonical.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261103075940.110308-4-matthew.ruffell@canonical.com> Hi Matthew, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Matthew-Ruffell/sched-isolation-Consider-nohz_full-CPUs-isolated-in-cpu_is_isolated-again/20261103-205935 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20261103075940.110308-4-matthew.ruffell%40canonical.com patch subject: [PATCH 3/6] mm/folio, mm/mlock: Don't batch folios in per-CPU LRU caches on isolated CPUs config: um-allnoconfig (https://download.01.org/0day-ci/archive/20261103/202611032053.I3Ud8d11-lkp@intel.com/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261103/202611032053.I3Ud8d11-lkp@intel.com/reproduce) 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-kbuild-all/202611032053.I3Ud8d11-lkp@intel.com/ All errors (new ones prefixed by >>): >> mm/folio.c:293:6: error: call to undeclared function 'lru_batching_bypassed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 293 | if (lru_batching_bypassed()) | ^ 1 error generated. vim +/lru_batching_bypassed +293 mm/folio.c 280 281 static void __folio_batch_add_and_move(struct folio_batch __percpu *fbatch, 282 struct folio *folio, move_fn_t move_fn, bool disable_irq) 283 { 284 unsigned long flags; 285 286 folio_get(folio); 287 288 if (disable_irq) 289 local_lock_irqsave(&cpu_fbatches.lock_irq, flags); 290 else 291 local_lock(&cpu_fbatches.lock); 292 > 293 if (lru_batching_bypassed()) 294 folio_move_lru_now(folio, move_fn); 295 else if (!folio_batch_add(this_cpu_ptr(fbatch), folio) || 296 !folio_may_be_lru_cached(folio) || lru_cache_disabled()) 297 folio_batch_move_lru(this_cpu_ptr(fbatch), move_fn); 298 299 if (disable_irq) 300 local_unlock_irqrestore(&cpu_fbatches.lock_irq, flags); 301 else 302 local_unlock(&cpu_fbatches.lock); 303 } 304 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki