Hi JP, 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/JP-Kobryn-Meta/mm-mempolicy-track-page-allocations-per-mempolicy/20260307-125642 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20260307045520.247998-1-jp.kobryn%40linux.dev patch subject: [PATCH v2] mm/mempolicy: track page allocations per mempolicy config: arm64-randconfig-001-20260307 (https://download.01.org/0day-ci/archive/20260308/[email protected]/config) compiler: aarch64-linux-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260308/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All error/warnings (new ones prefixed by >>): mm/mempolicy.c: In function 'mpol_count_numa_alloc': >> mm/mempolicy.c:2489:10: error: implicit declaration of function >> 'mem_cgroup_from_task'; did you mean 'perf_cgroup_from_task'? >> [-Werror=implicit-function-declaration] memcg = mem_cgroup_from_task(current); ^~~~~~~~~~~~~~~~~~~~ perf_cgroup_from_task >> mm/mempolicy.c:2489:8: warning: assignment to 'struct mem_cgroup *' from >> 'int' makes pointer from integer without a cast [-Wint-conversion] memcg = mem_cgroup_from_task(current); ^ cc1: some warnings being treated as errors vim +2489 mm/mempolicy.c 2429 2430 /* 2431 * Count a mempolicy allocation. Stats are tracked per-node and per-cgroup. 2432 * The following numa_{hit/miss/foreign} pattern is used: 2433 * 2434 * hit 2435 * - for BIND and PREFERRED_MANY, allocation succeeded on node in nodemask 2436 * - for other policies, allocation succeeded on intended node 2437 * - counted on the node of the allocation 2438 * miss 2439 * - allocation intended for other node, but happened on this one 2440 * - counted on other node 2441 * foreign 2442 * - allocation intended on this node, but happened on other node 2443 * - counted on this node 2444 */ 2445 static void mpol_count_numa_alloc(struct mempolicy *pol, int intended_nid, 2446 struct page *page, unsigned int order) 2447 { 2448 int actual_nid = page_to_nid(page); 2449 long nr_pages = 1L << order; 2450 enum node_stat_item hit_idx; 2451 struct mem_cgroup *memcg; 2452 struct lruvec *lruvec; 2453 bool is_hit; 2454 2455 if (!root_mem_cgroup || mem_cgroup_disabled()) 2456 return; 2457 2458 /* 2459 * Start with hit then use +1 or +2 later on to change to miss or 2460 * foreign respectively if needed. 2461 */ 2462 switch (pol->mode) { 2463 case MPOL_PREFERRED: 2464 hit_idx = NUMA_MPOL_PREFERRED_HIT; 2465 break; 2466 case MPOL_PREFERRED_MANY: 2467 hit_idx = NUMA_MPOL_PREFERRED_MANY_HIT; 2468 break; 2469 case MPOL_BIND: 2470 hit_idx = NUMA_MPOL_BIND_HIT; 2471 break; 2472 case MPOL_INTERLEAVE: 2473 hit_idx = NUMA_MPOL_INTERLEAVE_HIT; 2474 break; 2475 case MPOL_WEIGHTED_INTERLEAVE: 2476 hit_idx = NUMA_MPOL_WEIGHTED_INTERLEAVE_HIT; 2477 break; 2478 default: 2479 hit_idx = NUMA_MPOL_LOCAL_HIT; 2480 break; 2481 } 2482 2483 if (pol->mode == MPOL_BIND || pol->mode == MPOL_PREFERRED_MANY) 2484 is_hit = node_isset(actual_nid, pol->nodes); 2485 else 2486 is_hit = (actual_nid == intended_nid); 2487 2488 rcu_read_lock(); > 2489 memcg = mem_cgroup_from_task(current); 2490 2491 if (is_hit) { 2492 lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(actual_nid)); 2493 mod_lruvec_state(lruvec, hit_idx, nr_pages); 2494 } else { 2495 /* account for miss on the fallback node */ 2496 lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(actual_nid)); 2497 mod_lruvec_state(lruvec, hit_idx + 1, nr_pages); 2498 2499 /* account for foreign on the intended node */ 2500 lruvec = mem_cgroup_lruvec(memcg, NODE_DATA(intended_nid)); 2501 mod_lruvec_state(lruvec, hit_idx + 2, nr_pages); 2502 } 2503 2504 rcu_read_unlock(); 2505 } 2506 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
