Hi Hoeun, [auto build test ERROR on next-20170208] [also build test ERROR on v4.10-rc7] [cannot apply to linus/master linux/master v4.9-rc8 v4.9-rc7 v4.9-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Hoeun-Ryu/fork-free-vmapped-stacks-in-cache-when-cpus-are-offline/20170209-124143 config: parisc-c3000_defconfig (attached as .config) compiler: hppa-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=parisc All error/warnings (new ones prefixed by >>): kernel/fork.c: In function 'free_vm_stack_cache': >> kernel/fork.c:177:18: error: 'NR_CACHED_STACKS' undeclared (first use in >> this function) for (i = 0; i < NR_CACHED_STACKS; i++) { ^~~~~~~~~~~~~~~~ kernel/fork.c:177:18: note: each undeclared identifier is reported only once for each function it appears in In file included from include/asm-generic/percpu.h:6:0, from ./arch/parisc/include/generated/asm/percpu.h:1, from arch/parisc/include/asm/processor.h:19, from arch/parisc/include/asm/thread_info.h:7, from include/linux/thread_info.h:25, from include/asm-generic/preempt.h:4, from ./arch/parisc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:59, from include/linux/spinlock.h:50, from include/linux/mmzone.h:7, from include/linux/gfp.h:5, from include/linux/slab.h:14, from kernel/fork.c:14: >> kernel/fork.c:178:46: error: 'cached_stacks' undeclared (first use in this >> function) struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^ include/linux/percpu-defs.h:305:9: note: in definition of macro '__pcpu_size_call_return' typeof(variable) pscr_ret__; \ ^~~~~~~~ >> kernel/fork.c:178:32: note: in expansion of macro 'this_cpu_read' struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^~~~~~~~~~~~~ >> include/linux/percpu-defs.h:304:1: warning: initialization makes pointer >> from integer without a cast [-Wint-conversion] ({ \ ^ include/linux/percpu-defs.h:494:29: note: in expansion of macro '__pcpu_size_call_return' #define this_cpu_read(pcp) __pcpu_size_call_return(this_cpu_read_, pcp) ^~~~~~~~~~~~~~~~~~~~~~~ >> kernel/fork.c:178:32: note: in expansion of macro 'this_cpu_read' struct vm_struct *vm_stack = this_cpu_read(cached_stacks[i]); ^~~~~~~~~~~~~ At top level: kernel/fork.c:173:12: warning: 'free_vm_stack_cache' defined but not used [-Wunused-function] static int free_vm_stack_cache(unsigned int cpu) ^~~~~~~~~~~~~~~~~~~ vim +/NR_CACHED_STACKS +177 kernel/fork.c 8 * 'fork.c' contains the help-routines for the 'fork' system call 9 * (see also entry.S and others). 10 * Fork is rather simple, once you get the hang of it, but the memory 11 * management can be a bitch. See 'mm/memory.c': 'copy_page_range()' 12 */ 13 > 14 #include <linux/slab.h> 15 #include <linux/init.h> 16 #include <linux/unistd.h> 17 #include <linux/module.h> 18 #include <linux/vmalloc.h> 19 #include <linux/completion.h> 20 #include <linux/personality.h> 21 #include <linux/mempolicy.h> 22 #include <linux/sem.h> 23 #include <linux/file.h> 24 #include <linux/fdtable.h> 25 #include <linux/iocontext.h> 26 #include <linux/key.h> 27 #include <linux/binfmts.h> 28 #include <linux/mman.h> 29 #include <linux/mmu_notifier.h> 30 #include <linux/fs.h> 31 #include <linux/mm.h> 32 #include <linux/vmacache.h> 33 #include <linux/nsproxy.h> 34 #include <linux/capability.h> 35 #include <linux/cpu.h> 36 #include <linux/cgroup.h> 37 #include <linux/security.h> 38 #include <linux/hugetlb.h> 39 #include <linux/seccomp.h> 40 #include <linux/swap.h> 41 #include <linux/syscalls.h> 42 #include <linux/jiffies.h> 43 #include <linux/futex.h> 44 #include <linux/compat.h> 45 #include <linux/kthread.h> 46 #include <linux/task_io_accounting_ops.h> 47 #include <linux/rcupdate.h> 48 #include <linux/ptrace.h> 49 #include <linux/mount.h> 50 #include <linux/audit.h> 51 #include <linux/memcontrol.h> 52 #include <linux/ftrace.h> 53 #include <linux/proc_fs.h> 54 #include <linux/profile.h> 55 #include <linux/rmap.h> 56 #include <linux/ksm.h> 57 #include <linux/acct.h> 58 #include <linux/userfaultfd_k.h> 59 #include <linux/tsacct_kern.h> 60 #include <linux/cn_proc.h> 61 #include <linux/freezer.h> 62 #include <linux/delayacct.h> 63 #include <linux/taskstats_kern.h> 64 #include <linux/random.h> 65 #include <linux/tty.h> 66 #include <linux/blkdev.h> 67 #include <linux/fs_struct.h> 68 #include <linux/magic.h> 69 #include <linux/perf_event.h> 70 #include <linux/posix-timers.h> 71 #include <linux/user-return-notifier.h> 72 #include <linux/oom.h> 73 #include <linux/khugepaged.h> 74 #include <linux/signalfd.h> 75 #include <linux/uprobes.h> 76 #include <linux/aio.h> 77 #include <linux/compiler.h> 78 #include <linux/sysctl.h> 79 #include <linux/kcov.h> 80 81 #include <asm/pgtable.h> 82 #include <asm/pgalloc.h> 83 #include <linux/uaccess.h> 84 #include <asm/mmu_context.h> 85 #include <asm/cacheflush.h> 86 #include <asm/tlbflush.h> 87 88 #include <trace/events/sched.h> 89 90 #define CREATE_TRACE_POINTS 91 #include <trace/events/task.h> 92 93 /* 94 * Minimum number of threads to boot the kernel 95 */ 96 #define MIN_THREADS 20 97 98 /* 99 * Maximum number of threads 100 */ 101 #define MAX_THREADS FUTEX_TID_MASK 102 103 /* 104 * Protected counters by write_lock_irq(&tasklist_lock) 105 */ 106 unsigned long total_forks; /* Handle normal Linux uptimes. */ 107 int nr_threads; /* The idle threads do not count.. */ 108 109 int max_threads; /* tunable limit on nr_threads */ 110 111 DEFINE_PER_CPU(unsigned long, process_counts) = 0; 112 113 __cacheline_aligned DEFINE_RWLOCK(tasklist_lock); /* outer */ 114 115 #ifdef CONFIG_PROVE_RCU 116 int lockdep_tasklist_lock_is_held(void) 117 { 118 return lockdep_is_held(&tasklist_lock); 119 } 120 EXPORT_SYMBOL_GPL(lockdep_tasklist_lock_is_held); 121 #endif /* #ifdef CONFIG_PROVE_RCU */ 122 123 int nr_processes(void) 124 { 125 int cpu; 126 int total = 0; 127 128 for_each_possible_cpu(cpu) 129 total += per_cpu(process_counts, cpu); 130 131 return total; 132 } 133 134 void __weak arch_release_task_struct(struct task_struct *tsk) 135 { 136 } 137 138 #ifndef CONFIG_ARCH_TASK_STRUCT_ALLOCATOR 139 static struct kmem_cache *task_struct_cachep; 140 141 static inline struct task_struct *alloc_task_struct_node(int node) 142 { 143 return kmem_cache_alloc_node(task_struct_cachep, GFP_KERNEL, node); 144 } 145 146 static inline void free_task_struct(struct task_struct *tsk) 147 { 148 kmem_cache_free(task_struct_cachep, tsk); 149 } 150 #endif 151 152 void __weak arch_release_thread_stack(unsigned long *stack) 153 { 154 } 155 156 #ifndef CONFIG_ARCH_THREAD_STACK_ALLOCATOR 157 158 /* 159 * Allocate pages if THREAD_SIZE is >= PAGE_SIZE, otherwise use a 160 * kmemcache based allocator. 161 */ 162 # if THREAD_SIZE >= PAGE_SIZE || defined(CONFIG_VMAP_STACK) 163 164 #ifdef CONFIG_VMAP_STACK 165 /* 166 * vmalloc() is a bit slow, and calling vfree() enough times will force a TLB 167 * flush. Try to minimize the number of calls by caching stacks. 168 */ 169 #define NR_CACHED_STACKS 2 170 static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]); 171 #endif 172 173 static int free_vm_stack_cache(unsigned int cpu) 174 { 175 int i; 176 > 177 for (i = 0; i < NR_CACHED_STACKS; i++) { > 178 struct vm_struct *vm_stack = > this_cpu_read(cached_stacks[i]); 179 if (!vm_stack) 180 continue; 181 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
Description: application/gzip
