Hi zhaoyang.huang, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/zhaoyang-huang/mm-optimization-on-page-allocation-when-CMA-enabled/20230428-190140 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/1682679641-13652-1-git-send-email-zhaoyang.huang%40unisoc.com patch subject: [PATCH] mm: optimization on page allocation when CMA enabled config: alpha-randconfig-r014-20230428 (https://download.01.org/0day-ci/archive/20230428/202304282118.os2SZpZS-lkp@xxxxxxxxx/config) compiler: alpha-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/dbda57eee661a0c9b47f23720bcc9741495d00a5 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review zhaoyang-huang/mm-optimization-on-page-allocation-when-CMA-enabled/20230428-190140 git checkout dbda57eee661a0c9b47f23720bcc9741495d00a5 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304282118.os2SZpZS-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mm/page_alloc.c: In function '__rmqueue': >> mm/page_alloc.c:2328:42: error: implicit declaration of function '__if_use_cma_first' [-Werror=implicit-function-declaration] 2328 | bool cma_first = __if_use_cma_first(zone, order, alloc_flags); | ^~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/__if_use_cma_first +2328 mm/page_alloc.c 2277 2278 #ifdef CONFIG_CMA 2279 static bool __if_use_cma_first(struct zone *zone, unsigned int order, unsigned int alloc_flags) 2280 { 2281 unsigned long cma_proportion = 0; 2282 unsigned long cma_free_proportion = 0; 2283 unsigned long watermark = 0; 2284 unsigned long wm_fact[ALLOC_WMARK_MASK] = {1, 1, 2}; 2285 long count = 0; 2286 bool cma_first = false; 2287 2288 watermark = wmark_pages(zone, alloc_flags & ALLOC_WMARK_MASK); 2289 /*check if GFP_MOVABLE pass previous watermark check via the help of CMA*/ 2290 if (!zone_watermark_ok(zone, order, watermark, 0, alloc_flags & (~ALLOC_CMA))) 2291 { 2292 alloc_flags &= ALLOC_WMARK_MASK; 2293 /* WMARK_LOW failed lead to using cma first, this helps U&R stay 2294 * around low when being drained by GFP_MOVABLE 2295 */ 2296 if (alloc_flags <= ALLOC_WMARK_LOW) 2297 cma_first = true; 2298 /*check proportion for WMARK_HIGH*/ 2299 else { 2300 count = atomic_long_read(&zone->managed_pages); 2301 cma_proportion = zone->cma_pages * 100 / count; 2302 cma_free_proportion = zone_page_state(zone, NR_FREE_CMA_PAGES) * 100 2303 / zone_page_state(zone, NR_FREE_PAGES); 2304 cma_first = (cma_free_proportion >= wm_fact[alloc_flags] * cma_proportion 2305 || cma_free_proportion >= 50); 2306 } 2307 } 2308 return cma_first; 2309 } 2310 #endif 2311 /* 2312 * Do the hard work of removing an element from the buddy allocator. 2313 * Call me with the zone->lock already held. 2314 */ 2315 static __always_inline struct page * 2316 __rmqueue(struct zone *zone, unsigned int order, int migratetype, 2317 unsigned int alloc_flags) 2318 { 2319 struct page *page; 2320 2321 if (IS_ENABLED(CONFIG_CMA)) { 2322 /* 2323 * Balance movable allocations between regular and CMA areas by 2324 * allocating from CMA when over half of the zone's free memory 2325 * is in the CMA area. 2326 */ 2327 if (migratetype == MIGRATE_MOVABLE) { > 2328 bool cma_first = __if_use_cma_first(zone, order, alloc_flags); 2329 page = cma_first ? __rmqueue_cma_fallback(zone, order) : NULL; 2330 if (page) 2331 return page; 2332 } 2333 } 2334 retry: 2335 page = __rmqueue_smallest(zone, order, migratetype); 2336 if (unlikely(!page)) { 2337 if (alloc_flags & ALLOC_CMA) 2338 page = __rmqueue_cma_fallback(zone, order); 2339 2340 if (!page && __rmqueue_fallback(zone, order, migratetype, 2341 alloc_flags)) 2342 goto retry; 2343 } 2344 return page; 2345 } 2346 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
