From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0689EECAAD5 for ; Mon, 5 Sep 2022 18:47:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=vrOE5RZCROGMesVD9OAekjy0ei8BwSs5KJCEsNfuz1k=; b=q8bAoZNy0Dvvel 112NbxnEkkouZzSRFWq8yrBEbEmlOWZOBSQaSMHryPGvh7Z4V5lK+mrAH/Cy9v6hkALd3toA7xiv/ TruKVbuSEGGXoE25MAJCcF4TTvIYbua9JvDXWiIDn/twl6SrpqgfqawJfmpxr/hM1l/BtInVFrZGb s28wQDpcFOFdEwI2DiM17rRkmak09aowR0UXEDajWtwYw88ddNt1pjW/vABDXR4F5gtd8Yms5NYgj l4D64nnM+E4b4o21V/sEpJywNRpdu+LBOtszsJla7DaSQOo+rxnFhqKhpmz31gV0Vlf84KegY2wwe Aoc7I/1OfqkxEgoV0oJQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVH6t-008ekj-BU; Mon, 05 Sep 2022 18:46:16 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVFU5-007D4s-Id for linux-arm-kernel@lists.infradead.org; Mon, 05 Sep 2022 17:02:30 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id F1D0B61326; Mon, 5 Sep 2022 17:02:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EA15C433D6; Mon, 5 Sep 2022 17:01:59 +0000 (UTC) Date: Mon, 5 Sep 2022 18:01:55 +0100 From: Catalin Marinas To: kernel test robot Cc: Peter Collingbourne , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kbuild-all@lists.01.org, Cornelia Huck , Will Deacon , Marc Zyngier , Evgenii Stepanov , kvm@vger.kernel.org, Steven Price , Vincenzo Frascino Subject: Re: [PATCH v3 3/7] mm: Add PG_arch_3 page flag Message-ID: References: <20220810193033.1090251-4-pcc@google.com> <202208111500.62e0Bl2l-lkp@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220905_100225_405154_C3990D39 X-CRM114-Status: GOOD ( 27.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Sep 01, 2022 at 06:59:23PM +0100, Catalin Marinas wrote: > On Thu, Aug 11, 2022 at 03:16:08PM +0800, kernel test robot wrote: > > Thank you for the patch! Perhaps something to improve: > > > > [auto build test WARNING on arm64/for-next/core] > > [also build test WARNING on linus/master next-20220811] > > [cannot apply to kvmarm/next arm/for-next soc/for-next xilinx-xlnx/master v5.19] > > [If your patch is applied to the wrong git tree, kindly drop us a note. > > And when submitting patch, we suggest to use '--base' as documented in > > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > > > url: https://github.com/intel-lab-lkp/linux/commits/Peter-Collingbourne/KVM-arm64-permit-MAP_SHARED-mappings-with-MTE-enabled/20220811-033310 > > base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core > > config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20220811/202208111500.62e0Bl2l-lkp@intel.com/config) > > compiler: loongarch64-linux-gcc (GCC) 12.1.0 > > reproduce (this is a W=1 build): > > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > > chmod +x ~/bin/make.cross > > # https://github.com/intel-lab-lkp/linux/commit/1a400517d8428df0ec9f86f8d303b2227ee9702f > > git remote add linux-review https://github.com/intel-lab-lkp/linux > > git fetch --no-tags linux-review Peter-Collingbourne/KVM-arm64-permit-MAP_SHARED-mappings-with-MTE-enabled/20220811-033310 > > git checkout 1a400517d8428df0ec9f86f8d303b2227ee9702f > > # save the config file > > mkdir build_dir && cp config build_dir/.config > > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash > > > > If you fix the issue, kindly add following tag where applicable > > Reported-by: kernel test robot > > > > All warnings (new ones prefixed by >>): > > > > >> mm/memory.c:92:2: warning: #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. [-Wcpp] > > 92 | #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. > > | ^~~~~~~ > > > > > > vim +92 mm/memory.c > > > > 42b7772812d15b Jan Beulich 2008-07-23 90 > > af27d9403f5b80 Arnd Bergmann 2018-02-16 91 #if defined(LAST_CPUPID_NOT_IN_PAGE_FLAGS) && !defined(CONFIG_COMPILE_TEST) > > 90572890d20252 Peter Zijlstra 2013-10-07 @92 #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last_cpupid. > > 75980e97daccfc Peter Zijlstra 2013-02-22 93 #endif > > 75980e97daccfc Peter Zijlstra 2013-02-22 94 > > It looks like ith CONFIG_NUMA_BALANCING=y on loongarch we run out of > spare bits in page->flags to fit last_cpupid. The reason we don't see it > on arm64 is that we select SPARSEMEM_VMEMMAP and SECTIONS_WIDTH becomes > 0. On loongarch SECTIONS_WIDTH takes 19 bits (48 - 29) in page->flags. > > I think instead of always defining PG_arch_{2,3} if CONFIG_64BIT, we > could add a CONFIG_ARCH_WANTS_PG_ARCH_23 option and only select it on > arm64 for the time being. I pushed a patch as the first one on the arm64 devel/mte-pg-flags branch. Also updated the last patch on this branch following Steven's comments. Peter, please let me know if you want to pick this series up together with your other KVM patches. Otherwise I can post it separately, it's worth merging it on its own as it clarifies the page flag vs tag setting ordering. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel