Hi Dmitry, 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/Dmitry-Rokosov/mm-memcg-print-out-cgroup-name-in-the-memcg-tracepoints/20231101-183040 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20231101102837.25205-3-ddrokosov%40salutedevices.com patch subject: [PATCH v1 2/2] mm: memcg: introduce new event to trace shrink_memcg config: um-allyesconfig (https://download.01.org/0day-ci/archive/20231101/202311012319.7ULVSdyR-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231101/202311012319.7ULVSdyR-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/202311012319.7ULVSdyR-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from mm/vmscan.c:19: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> mm/vmscan.c:5811:3: error: implicit declaration of function 'trace_mm_vmscan_memcg_shrink_begin' is invalid in C99 [-Werror,-Wimplicit-function-declaration] trace_mm_vmscan_memcg_shrink_begin(memcg, ^ mm/vmscan.c:5811:3: note: did you mean 'trace_mm_vmscan_lru_shrink_active'? include/trace/events/vmscan.h:467:1: note: 'trace_mm_vmscan_lru_shrink_active' declared here TRACE_EVENT(mm_vmscan_lru_shrink_active, ^ include/linux/tracepoint.h:566:2: note: expanded from macro 'TRACE_EVENT' DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) ^ include/linux/tracepoint.h:432:2: note: expanded from macro 'DECLARE_TRACE' __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), \ ^ include/linux/tracepoint.h:355:21: note: expanded from macro '__DECLARE_TRACE' static inline void trace_##name(proto) \ ^ <scratch space>:33:1: note: expanded from here trace_mm_vmscan_lru_shrink_active ^ >> mm/vmscan.c:5845:3: error: implicit declaration of function 'trace_mm_vmscan_memcg_shrink_end' is invalid in C99 [-Werror,-Wimplicit-function-declaration] trace_mm_vmscan_memcg_shrink_end(memcg, ^ mm/vmscan.c:5845:3: note: did you mean 'trace_mm_vmscan_memcg_shrink_begin'? mm/vmscan.c:5811:3: note: 'trace_mm_vmscan_memcg_shrink_begin' declared here trace_mm_vmscan_memcg_shrink_begin(memcg, ^ 12 warnings and 2 errors generated. vim +/trace_mm_vmscan_memcg_shrink_begin +5811 mm/vmscan.c 5791 5792 static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc) 5793 { 5794 struct mem_cgroup *target_memcg = sc->target_mem_cgroup; 5795 struct mem_cgroup *memcg; 5796 5797 memcg = mem_cgroup_iter(target_memcg, NULL, NULL); 5798 do { 5799 struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat); 5800 unsigned long reclaimed; 5801 unsigned long scanned; 5802 5803 /* 5804 * This loop can become CPU-bound when target memcgs 5805 * aren't eligible for reclaim - either because they 5806 * don't have any reclaimable pages, or because their 5807 * memory is explicitly protected. Avoid soft lockups. 5808 */ 5809 cond_resched(); 5810 > 5811 trace_mm_vmscan_memcg_shrink_begin(memcg, 5812 sc->order, 5813 sc->gfp_mask); 5814 5815 mem_cgroup_calculate_protection(target_memcg, memcg); 5816 5817 if (mem_cgroup_below_min(target_memcg, memcg)) { 5818 /* 5819 * Hard protection. 5820 * If there is no reclaimable memory, OOM. 5821 */ 5822 continue; 5823 } else if (mem_cgroup_below_low(target_memcg, memcg)) { 5824 /* 5825 * Soft protection. 5826 * Respect the protection only as long as 5827 * there is an unprotected supply 5828 * of reclaimable memory from other cgroups. 5829 */ 5830 if (!sc->memcg_low_reclaim) { 5831 sc->memcg_low_skipped = 1; 5832 continue; 5833 } 5834 memcg_memory_event(memcg, MEMCG_LOW); 5835 } 5836 5837 reclaimed = sc->nr_reclaimed; 5838 scanned = sc->nr_scanned; 5839 5840 shrink_lruvec(lruvec, sc); 5841 5842 shrink_slab(sc->gfp_mask, pgdat->node_id, memcg, 5843 sc->priority); 5844 > 5845 trace_mm_vmscan_memcg_shrink_end(memcg, 5846 sc->nr_reclaimed - reclaimed); 5847 5848 /* Record the group's reclaim efficiency */ 5849 if (!sc->proactive) 5850 vmpressure(sc->gfp_mask, memcg, false, 5851 sc->nr_scanned - scanned, 5852 sc->nr_reclaimed - reclaimed); 5853 5854 } while ((memcg = mem_cgroup_iter(target_memcg, memcg, NULL))); 5855 } 5856 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
