Hi, Two issues with the patch, firstly the 64 bit divisions should be using div64_u64() and also on i386 testing in a VM the selection of the raid6 avx2* algorithm is sometimes incorrect because of a difference in benchmark speed rates on avx2x2 and avx2x1 - so I think this patch needs to be reverted/removed for now until I can figure out why it's not fully stable. Colin -----Original Message----- From: lkp <lkp@xxxxxxxxx> Sent: Tuesday, August 6, 2024 5:01 AM To: King, Colin <colin.king@xxxxxxxxx>; Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>; Masahiro Yamada <masahiroy@xxxxxxxxxx>; rppt@xxxxxxxxxx Cc: oe-kbuild-all@xxxxxxxxxxxxxxx; Linux Memory Management List <linux-mm@xxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx Subject: Re: [PATCH] md/raid6 algorithms: scale test duration for speedier boots Hi Colin, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-nonmm-unstable] [also build test ERROR on akpm-mm/mm-everything linus/master v6.11-rc2 next-20240805] [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/Colin-Ian-King/md-raid6-algorithms-scale-test-duration-for-speedier-boots/20240806-012444 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable patch link: https://lore.kernel.org/r/20240805170816.6025-1-colin.king%40intel.com patch subject: [PATCH] md/raid6 algorithms: scale test duration for speedier boots config: i386-buildonly-randconfig-002-20240806 (https://download.01.org/0day-ci/archive/20240806/202408061134.O5o8RpVV-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240806/202408061134.O5o8RpVV-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/202408061134.O5o8RpVV-lkp@intel. | com/ All errors (new ones prefixed by >>): ld: lib/raid6/algos.o: in function `raid6_choose_gen.constprop.0': >> algos.c:(.text+0xe6): undefined reference to `__udivdi3' >> ld: algos.c:(.text+0x163): undefined reference to `__udivdi3' ld: algos.c:(.text+0x1fd): undefined reference to `__udivdi3' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
