Will fix it in V10. Thanks, On Sun, Mar 31, 2024 at 3:23 AM kernel test robot <lkp@xxxxxxxxx> wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable > head: 0cef2c0a2a356137b170c3cb46cb9c1dd2ca3e6b > commit: fbc8b54896eef0b4d9aaa793523867c7eb86e788 [263/270] memory tier: create CPUless memory tiers after obtaining HMAT info > config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20240331/202403311826.SNOu8jAt-lkp@xxxxxxxxx/config) > compiler: gcc-11 (Ubuntu 11.4.0-4ubuntu1) 11.4.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240331/202403311826.SNOu8jAt-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> > | Closes: https://lore.kernel.org/oe-kbuild-all/202403311826.SNOu8jAt-lkp@xxxxxxxxx/ > > All warnings (new ones prefixed by >>): > > mm/memory-tiers.c: In function 'mt_perf_to_adistance': > >> mm/memory-tiers.c:769:13: warning: variable 'rc' set but not used [-Wunused-but-set-variable] > 769 | int rc = 0; > | ^~ > > > vim +/rc +769 mm/memory-tiers.c > > 766 > 767 int mt_perf_to_adistance(struct access_coordinate *perf, int *adist) > 768 { > > 769 int rc = 0; > 770 > 771 mutex_lock(&default_dram_perf_lock); > 772 if (default_dram_perf_error) { > 773 rc = -EIO; > 774 goto out; > 775 } > 776 > 777 if (perf->read_latency + perf->write_latency == 0 || > 778 perf->read_bandwidth + perf->write_bandwidth == 0) { > 779 rc = -EINVAL; > 780 goto out; > 781 } > 782 > 783 if (default_dram_perf_ref_nid == NUMA_NO_NODE) { > 784 rc = -ENOENT; > 785 goto out; > 786 } > 787 /* > 788 * The abstract distance of a memory node is in direct proportion to > 789 * its memory latency (read + write) and inversely proportional to its > 790 * memory bandwidth (read + write). The abstract distance, memory > 791 * latency, and memory bandwidth of the default DRAM nodes are used as > 792 * the base. > 793 */ > 794 *adist = MEMTIER_ADISTANCE_DRAM * > 795 (perf->read_latency + perf->write_latency) / > 796 (default_dram_perf.read_latency + default_dram_perf.write_latency) * > 797 (default_dram_perf.read_bandwidth + default_dram_perf.write_bandwidth) / > 798 (perf->read_bandwidth + perf->write_bandwidth); > 799 > 800 out: > 801 mutex_unlock(&default_dram_perf_lock); > 802 return 0; > 803 } > 804 EXPORT_SYMBOL_GPL(mt_perf_to_adistance); > 805 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki -- Best regards, Ho-Ren (Jack) Chuang 莊賀任
