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X-CSE-ConnectionGUID: A+vUGxioRBaighkIBsLZlg== X-CSE-MsgGUID: UoHsKwX2Qt24duZkbkPadA== X-IronPort-AV: E=McAfee;i="6700,10204,11193"; a="27936392" X-IronPort-AV: E=Sophos;i="6.10,223,1719903600"; d="scan'208";a="27936392" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Sep 2024 08:45:15 -0700 X-CSE-ConnectionGUID: APSUk5wjTKm2ulJ/KFUIuw== X-CSE-MsgGUID: CzzMDPpXR7yA6cA3hYPWrg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,223,1719903600"; d="scan'208";a="72754341" Received: from lkp-server01.sh.intel.com (HELO 53e96f405c61) ([10.239.97.150]) by orviesa004.jf.intel.com with ESMTP; 12 Sep 2024 08:45:08 -0700 Received: from kbuild by 53e96f405c61 with local (Exim 4.96) (envelope-from ) id 1som0H-0005P4-1o; Thu, 12 Sep 2024 15:45:05 +0000 Date: Thu, 12 Sep 2024 23:44:42 +0800 From: kernel test robot To: Dev Jain , akpm@linux-foundation.org, david@redhat.com, willy@infradead.org, kirill.shutemov@linux.intel.com Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, ryan.roberts@arm.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, cl@gentwo.org, vbabka@suse.cz, mhocko@suse.com, apopple@nvidia.com, dave.hansen@linux.intel.com, will@kernel.org, baohua@kernel.org, jack@suse.cz, mark.rutland@arm.com, hughd@google.com, aneesh.kumar@kernel.org, yang@os.amperecomputing.com, peterx@redhat.com, ioworker0@gmail.com, jglisse@google.com, wangkefeng.wang@huawei.com, ziy@nvidia.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Dev Jain Subject: Re: [PATCH v3 2/2] mm: Allocate THP on hugezeropage wp-fault Message-ID: <202409122349.PQp7sq2x-lkp@intel.com> References: <20240911065600.1002644-3-dev.jain@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240911065600.1002644-3-dev.jain@arm.com> X-Rspamd-Queue-Id: 8369540026 X-Stat-Signature: giqmaapyte75d3anufqim19p4iws1zuy X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1726155916-975890 X-HE-Meta: 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 PekAQ+gG peZSjbzLlDwrV19tzgTOE/NXPE7J9gl+ejHgwHlKxxua/97MozxPhW6uaMckozQVZWUSHAV5gZz9DXkfa4NoRNh3nzat6kZyAHq82SaBpEO+D0Qp5x9gtA6dN2LjYnhXEFQgumx/m81tS4nPUHTOHY/elwc44Cz8phXEI2pwW3wkFyyLy214xS5SD/jN9NZ08MDXTGqxuAx5fj9jymeiKnZI2KmYf631R6wbeLtCHXSXlTSwZY1pO8tCnhvNOylXW1NudktRIDDNXyU53tyMKzxgHqdpCSAeSe/WnIZJUI+fvQyNFAtmis0lxuPhWNMhdI8jo6O/eC+LhOYLZKysD7QEZPqQ6mMjrMPQQ6HHPtDPXlFiBhpFIWH7Un4ryxQnLaCG+E1AHL61HvXJeSVf9yLqAFSHPvpyWY8iL X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Dev, kernel test robot noticed the following build warnings: [auto build test WARNING on v6.11-rc7] [also build test WARNING on linus/master] [cannot apply to akpm-mm/mm-everything next-20240912] [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/Dev-Jain/mm-Abstract-THP-allocation/20240911-145809 base: v6.11-rc7 patch link: https://lore.kernel.org/r/20240911065600.1002644-3-dev.jain%40arm.com patch subject: [PATCH v3 2/2] mm: Allocate THP on hugezeropage wp-fault config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240912/202409122349.PQp7sq2x-lkp@intel.com/config) compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240912/202409122349.PQp7sq2x-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/202409122349.PQp7sq2x-lkp@intel.com/ All warnings (new ones prefixed by >>): >> mm/huge_memory.c:990:15: warning: variable 'old_pmd' set but not used [-Wunused-but-set-variable] 990 | pmd_t entry, old_pmd; | ^ mm/huge_memory.c:1016:6: warning: variable 'pgtable' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] 1016 | if (unlikely(!folio)) { | ^~~~~~~~~~~~~~~~ include/linux/compiler.h:77:22: note: expanded from macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ mm/huge_memory.c:1055:6: note: uninitialized use occurs here 1055 | if (pgtable) | ^~~~~~~ mm/huge_memory.c:1016:2: note: remove the 'if' if its condition is always false 1016 | if (unlikely(!folio)) { | ^~~~~~~~~~~~~~~~~~~~~~~ 1017 | ret = VM_FAULT_FALLBACK; | ~~~~~~~~~~~~~~~~~~~~~~~~ 1018 | goto release; | ~~~~~~~~~~~~~ 1019 | } | ~ mm/huge_memory.c:1010:19: note: initialize the variable 'pgtable' to silence this warning 1010 | pgtable_t pgtable; | ^ | = NULL 2 warnings generated. vim +/old_pmd +990 mm/huge_memory.c 986 987 static void map_pmd_thp(struct folio *folio, struct vm_fault *vmf, 988 struct vm_area_struct *vma, unsigned long haddr) 989 { > 990 pmd_t entry, old_pmd; 991 bool is_pmd_none = pmd_none(*vmf->pmd); 992 993 entry = mk_huge_pmd(&folio->page, vma->vm_page_prot); 994 entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma); 995 folio_add_new_anon_rmap(folio, vma, haddr, RMAP_EXCLUSIVE); 996 folio_add_lru_vma(folio, vma); 997 if (!is_pmd_none) 998 old_pmd = pmdp_huge_clear_flush(vma, haddr, vmf->pmd); 999 set_pmd_at(vma->vm_mm, haddr, vmf->pmd, entry); 1000 update_mmu_cache_pmd(vma, vmf->address, vmf->pmd); 1001 add_mm_counter(vma->vm_mm, MM_ANONPAGES, HPAGE_PMD_NR); 1002 if (is_pmd_none) 1003 mm_inc_nr_ptes(vma->vm_mm); 1004 } 1005 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki