linux-kernel - [ammarfaizi2-block:arm64/linux/devel/mte-pg-flags 3/5] mm/memory.c:92:2: warning: #warning Unfortunate NUMA and NUMA Balancing config, growing page-frame for last

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Date:   Sat, 3 Sep 2022 19:33:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Collingbourne <pcc@...gle.com>
Cc:     kbuild-all@...ts.01.org, Ammar Faizi <ammarfaizi2@...weeb.org>,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>
Subject: [ammarfaizi2-block:arm64/linux/devel/mte-pg-flags 3/5]
 mm/memory.c:92:2: warning: #warning Unfortunate NUMA and NUMA Balancing
 config, growing page-frame for last_cpupid.

tree:   https://github.com/ammarfaizi2/linux-block arm64/linux/devel/mte-pg-flags
head:   7a937f62486a95ed542d051f05e3d6d67c9d0928
commit: 16cd379cfa9ae2607ceb5f2b66c27a5bedb3e2bf [3/5] mm: Add PG_arch_3 page flag
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20220903/202209031914.1xwP1jsq-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/ammarfaizi2/linux-block/commit/16cd379cfa9ae2607ceb5f2b66c27a5bedb3e2bf
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block arm64/linux/devel/mte-pg-flags
        git checkout 16cd379cfa9ae2607ceb5f2b66c27a5bedb3e2bf
        # 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 <lkp@...el.com>

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  

:::::: The code at line 92 was first introduced by commit
:::::: 90572890d202527c366aa9489b32404e88a7c020 mm: numa: Change page last {nid,pid} into {cpu,pid}

:::::: TO: Peter Zijlstra <peterz@...radead.org>
:::::: CC: Ingo Molnar <mingo@...nel.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp