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/linux/include/linux/
H A Dpid.h57 struct pid { struct
77 extern struct pid init_struct_pid; argument
81 struct pid *pidfd_pid(const struct file *file);
82 struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);
84 int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret_file);
87 static inline struct pid *get_pid(struct pid *pid) in get_pid() argument
89 if (pid) in get_pid()
90 refcount_inc(&pid->count); in get_pid()
91 return pid; in get_pid()
94 extern void put_pid(struct pid *pid);
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H A Dpidfs.h7 struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags);
9 void pidfs_add_pid(struct pid *pid);
10 void pidfs_remove_pid(struct pid *pid);
16 int pidfs_register_pid(struct pid *pid);
17 void pidfs_free_pid(struct pid *pid);
/linux/tools/testing/selftests/powerpc/ptrace/
H A Dptrace-perf-hwbreak.c39 static inline long sys_ptrace(long request, pid_t pid, unsigned long addr, unsigned long data) in sys_ptrace() argument
41 return syscall(__NR_ptrace, request, pid, addr, data); in sys_ptrace()
49 static long ptrace_getregs(pid_t pid, struct pt_regs *result) in ptrace_getregs() argument
51 return sys_ptrace(PTRACE_GETREGS, pid, 0, (unsigned long)result); in ptrace_getregs()
54 static long ptrace_setregs(pid_t pid, struct pt_regs *result) in ptrace_setregs() argument
56 return sys_ptrace(PTRACE_SETREGS, pid, 0, (unsigned long)result); in ptrace_setregs()
59 static long ptrace_cont(pid_t pid, long signal) in ptrace_cont() argument
61 return sys_ptrace(PTRACE_CONT, pid, 0, signal); in ptrace_cont()
64 static long ptrace_singlestep(pid_t pid, long signal) in ptrace_singlestep() argument
66 return sys_ptrace(PTRACE_SINGLESTEP, pid, 0, signal); in ptrace_singlestep()
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/linux/kernel/
H A Dpid.c50 struct pid init_struct_pid = {
90 void put_pid(struct pid *pid) in put_pid() argument
94 if (!pid) in put_pid()
97 ns = pid->numbers[pid->level].ns; in put_pid()
98 if (refcount_dec_and_test(&pid->count)) { in put_pid()
99 pidfs_free_pid(pid); in put_pid()
100 kmem_cache_free(ns->pid_cachep, pid); in put_pid()
108 struct pid *pid = container_of(rhp, struct pid, rcu); in delayed_put_pid() local
109 put_pid(pid); in delayed_put_pid()
112 void free_pid(struct pid *pid) in free_pid() argument
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/linux/arch/powerpc/mm/book3s64/
H A Dradix_tlb.c29 unsigned int pid, in tlbiel_radix_set_isa300() argument
36 rs = ((unsigned long)pid << PPC_BITLSHIFT(31)); in tlbiel_radix_set_isa300()
100 static __always_inline void __tlbiel_pid(unsigned long pid, int set, in __tlbiel_pid() argument
107 rs = ((unsigned long)pid) << PPC_BITLSHIFT(31); in __tlbiel_pid()
116 static __always_inline void __tlbie_pid(unsigned long pid, unsigned long ric) in __tlbie_pid() argument
121 rs = pid << PPC_BITLSHIFT(31); in __tlbie_pid()
158 static __always_inline void __tlbiel_va(unsigned long va, unsigned long pid, in __tlbiel_va() argument
165 rs = pid << PPC_BITLSHIFT(31); in __tlbiel_va()
174 static __always_inline void __tlbie_va(unsigned long va, unsigned long pid, in __tlbie_va() argument
181 rs = pid << PPC_BITLSHIFT(31); in __tlbie_va()
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/linux/tools/testing/selftests/powerpc/signal/
H A Dsigreturn_kernel.c35 pid_t pid; in fork_child() local
37 pid = fork(); in fork_child()
38 if (pid == 0) { in fork_child()
43 return pid; in fork_child()
46 static int expect_segv(pid_t pid) in expect_segv() argument
50 waitpid(pid, &child_ret, 0); in expect_segv()
62 pid_t pid; in test_sigreturn_kernel() local
73 pid = fork_child(); in test_sigreturn_kernel()
74 expect_segv(pid); in test_sigreturn_kernel()
78 pid = fork_child(); in test_sigreturn_kernel()
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/linux/fs/
H A Dpidfs.c89 struct pid *pid_a = rb_entry(a, struct pid, pidfs_node); in pidfs_ino_cmp()
90 struct pid *pid_b = rb_entry(b, struct pid, pidfs_node); in pidfs_ino_cmp()
101 void pidfs_add_pid(struct pid *pid) in pidfs_add_pid() argument
133 pid->ino = pidfs_ino_nr; in pidfs_add_pid()
134 pid->stashed = NULL; in pidfs_add_pid()
135 pid->attr = NULL; in pidfs_add_pid()
139 rb_find_add_rcu(&pid->pidfs_node, &pidfs_ino_tree, pidfs_ino_cmp); in pidfs_add_pid()
143 void pidfs_remove_pid(struct pid *pid) in pidfs_remove_pid() argument
146 rb_erase(&pid->pidfs_node, &pidfs_ino_tree); in pidfs_remove_pid()
150 void pidfs_free_pid(struct pid *pid) in pidfs_free_pid() argument
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/linux/tools/testing/selftests/pid_namespace/
H A Dpid_max.c41 pid_t pid; in pid_max_cb() local
70 pid = fork(); in pid_max_cb()
71 if (pid == 0) in pid_max_cb()
73 wait_for_pid(pid); in pid_max_cb()
74 if (pid > 500) { in pid_max_cb()
138 pid_t pid; in pid_max_nested_inner() local
140 pid = fork(); in pid_max_nested_inner()
141 if (pid < 0) in pid_max_nested_inner()
144 if (pid == 0) in pid_max_nested_inner()
147 wait_for_pid(pid); in pid_max_nested_inner()
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/linux/tools/testing/selftests/rlimits/
H A Drlimits-per-userns.c32 pid_t pid = getpid(); in setrlimit_nproc() local
38 warnx("(pid=%d): Setting RLIMIT_NPROC=%ld", pid, n); in setrlimit_nproc()
41 err(EXIT_FAILURE, "(pid=%d): setrlimit(RLIMIT_NPROC)", pid); in setrlimit_nproc()
46 pid_t pid = fork(); in fork_child() local
48 if (pid < 0) in fork_child()
51 if (pid > 0) in fork_child()
52 return pid; in fork_child()
54 pid = getpid(); in fork_child()
56 warnx("(pid=%d): New process starting ...", pid); in fork_child()
59 err(EXIT_FAILURE, "(pid=%d): prctl(PR_SET_PDEATHSIG)", pid); in fork_child()
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/linux/include/trace/events/
H A Doom.h19 __field( pid_t, pid)
25 __entry->pid = task->pid;
31 __entry->pid, __entry->comm, __entry->oom_score_adj)
82 __field(int, pid)
94 __entry->pid = task->pid;
106 __entry->pid,
119 TP_PROTO(int pid),
121 TP_ARGS(pid),
124 __field(int, pid)
128 __entry->pid = pid;
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H A Dsched.h24 __field( pid_t, pid )
29 __entry->pid = t->pid;
32 TP_printk("comm=%s pid=%d", __get_str(comm), __entry->pid)
149 __field( pid_t, pid )
156 __entry->pid = p->pid;
162 __entry->comm, __entry->pid, __entry->prio,
241 __entry->prev_pid = prev->pid;
245 __entry->next_pid = next->pid;
280 __field( pid_t, pid )
288 __entry->pid = p->pid;
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/linux/arch/um/os-Linux/
H A Dstart_up.c44 int pid = os_getpid(), ppid = getppid(); in ptrace_child() local
50 kill(pid, SIGKILL); in ptrace_child()
52 kill(pid, SIGSTOP); in ptrace_child()
60 if (sc_result == pid) in ptrace_child()
107 int pid, n, status; in start_ptraced_child() local
111 pid = fork(); in start_ptraced_child()
112 if (pid == 0) in start_ptraced_child()
114 else if (pid < 0) in start_ptraced_child()
117 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); in start_ptraced_child()
124 return pid; in start_ptraced_child()
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/linux/tools/perf/scripts/perl/
H A Drw-by-pid.pl82 foreach my $pid (sort { ($reads{$b}{bytes_read} || 0) <=>
84 my $comm = $reads{$pid}{comm} || "";
85 my $total_reads = $reads{$pid}{total_reads} || 0;
86 my $bytes_requested = $reads{$pid}{bytes_requested} || 0;
87 my $bytes_read = $reads{$pid}{bytes_read} || 0;
89 printf("%6s %-20s %10s %10s %10s\n", $pid, $comm,
101 foreach my $pid (keys %reads) {
102 foreach my $error (keys %{$reads{$pid}{errors}}) {
103 my $comm = $reads{$pid}{comm} || "";
104 my $errcount = $reads{$pid}{errors}{$error} || 0;
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/linux/tools/testing/selftests/cgroup/
H A Dcgroup_util.c
/linux/tools/testing/selftests/namespaces/
H A Dcred_change_test.c33 pid_t pid; in TEST() local
52 pid = fork(); in TEST()
53 ASSERT_GE(pid, 0); in TEST()
55 if (pid == 0) { in TEST()
119 kill(pid, SIGKILL); in TEST()
120 waitpid(pid, NULL, 0); in TEST()
130 kill(pid, SIGKILL); in TEST()
131 waitpid(pid, NULL, 0); in TEST()
145 waitpid(pid, &status, 0); in TEST()
170 pid_t pid; in TEST() local
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H A Dnsid_test.c72 pid_t pid; in TEST_F() local
85 pid = fork(); in TEST_F()
86 ASSERT_GE(pid, 0); in TEST_F()
88 if (pid == 0) { in TEST_F()
113 self->child_pid = pid; in TEST_F()
132 snprintf(path, sizeof(path), "/proc/%d/ns/mnt", pid); in TEST_F()
178 pid_t pid; in TEST_F() local
191 pid = fork(); in TEST_F()
192 ASSERT_GE(pid, 0); in TEST_F()
194 if (pid == 0) { in TEST_F()
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/linux/tools/testing/selftests/cgroup/lib/
H A Dcgroup_util.c316 int pid = strtol(ptr, &ptr, 10); in cg_killall() local
318 if (pid == 0) in cg_killall()
324 if (kill(pid, SIGKILL)) in cg_killall()
351 int cg_enter(const char *cgroup, int pid) in cg_enter() argument
355 snprintf(pidbuf, sizeof(pidbuf), "%d", pid); in cg_enter()
373 int pid, retcode; in cg_run() local
375 pid = fork(); in cg_run()
376 if (pid < 0) { in cg_run()
377 return pid; in cg_run()
378 } else if (pid == 0) { in cg_run()
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/linux/arch/powerpc/mm/
H A Dmmu_decl.h31 static inline void _tlbil_pid(unsigned int pid) in _tlbil_pid() argument
34 trace_tlbia(pid); in _tlbil_pid()
36 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) argument
40 extern void _tlbil_pid(unsigned int pid);
42 extern void _tlbil_pid_noind(unsigned int pid);
44 #define _tlbil_pid_noind(pid) _tlbil_pid(pid) argument
52 static inline void _tlbil_va(unsigned long address, unsigned int pid, in _tlbil_va() argument
56 trace_tlbie(0, 0, address, pid, 0, 0, 0); in _tlbil_va()
59 extern void _tlbil_va(unsigned long address, unsigned int pid,
62 extern void __tlbil_va(unsigned long address, unsigned int pid);
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/linux/tools/testing/selftests/ptrace/
H A Dget_syscall_info.c17 kill_tracee(pid_t pid) in kill_tracee() argument
19 if (!pid) in kill_tracee()
24 int rc = kill(pid, SIGKILL); in kill_tracee()
31 sys_ptrace(int request, pid_t pid, unsigned long addr, unsigned long data) in sys_ptrace() argument
33 return syscall(__NR_ptrace, request, pid, addr, data); in sys_ptrace()
38 kill_tracee(pid); \
77 pid_t pid = fork(); in TEST() local
79 ASSERT_LE(0, pid) { in TEST()
83 if (pid == 0) { in TEST()
85 pid = getpid(); in TEST()
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/linux/Documentation/translations/zh_CN/accounting/
H A Dtaskstats.rst23 “pid”、“tid”、“任务”互换使用，用于描述由struct task_struct定义的标准
24 Linux任务。“每pid的统计数据”等价于“每任务的统计数据”。
35 （NETLINK_GENERIC族）然后发送指定pid或tgid的命令。响应消息中包含单个
36 任务的统计信息（若指定了pid）或进程所有任务汇总的统计信息（若指定了tgid）。
39 cpu掩码内的cpu上有任务退出时，每pid的统计信息将发送给注册成功的监听者。使用
44 记录也将发送给用户空间。后者包含线程组中所有线程（包括过去和现在）的每pid统计
59 struct taskstats是每pid和每tgid数据共用的计数结构体。它是版本化的，可在内核新增
71 1. 命令：由用户发送给内核。获取指定pid/tgid数据的命令包含一个类型为
72 TASKSTATS_CMD_ATTR_PID/TGID的属性，该属性包含u32的pid或tgid载荷。
73 pid/tgid指示用户空间要统计的任务/进程。
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/linux/scripts/
H A Dbootgraph.pl86 my $pid = $2;
88 if (!defined($pidctr{$pid})) {
89 $func = "wait_" . $pid . "_1";
90 $pidctr{$pid} = 1;
92 $pidctr{$pid} = $pidctr{$pid} + 1;
93 $func = "wait_" . $pid . "_" . $pidctr{$pid};
102 $pids{$func} = $pid;
114 my $pid = $2;
115 my $func = "wait_" . $pid . "_" . $pidctr{$pid};
178 my $pid = $pids{$key};
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/linux/drivers/media/common/b2c2/
H A Dflexcop-hw-filter.c47 u16 pid, u16 mask) in flexcop_pid_group_filter() argument
51 v30c.pid_filter_30c_ext_ind_0_7.Group_PID = pid; in flexcop_pid_group_filter()
68 vpid.vregname.field = onoff ? pid : 0x1fff; \
75 u16 pid, int onoff) in flexcop_pid_Stream1_PID_ctrl() argument
82 u16 pid, int onoff) in flexcop_pid_Stream2_PID_ctrl() argument
89 u16 pid, int onoff) in flexcop_pid_PCR_PID_ctrl() argument
95 u16 pid, int onoff) in flexcop_pid_PMT_PID_ctrl() argument
101 u16 pid, int onoff) in flexcop_pid_EMM_PID_ctrl() argument
107 u16 pid, int onoff) in flexcop_pid_ECM_PID_ctrl() argument
113 int index, u16 pid, int onoff) in flexcop_pid_control() argument
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/linux/tools/testing/selftests/clone3/
H A Dclone3_set_tid.c45 pid_t pid = -1; in call_clone3_set_tid() local
54 pid = sys_clone3(&args, sizeof(args)); in call_clone3_set_tid()
55 if (pid < 0) { in call_clone3_set_tid()
61 if (pid == 0) { in call_clone3_set_tid()
96 if (expected_pid == 0 || expected_pid == pid) { in call_clone3_set_tid()
98 getpid(), pid); in call_clone3_set_tid()
102 expected_pid, pid); in call_clone3_set_tid()
106 if (waitpid(pid, &status, 0) < 0) { in call_clone3_set_tid()
151 pid_t pid, ns1, ns2, ns3, ns_pid; in main() local
270 pid = fork(); in main()
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/linux/tools/testing/selftests/proc/
H A Dproc-empty-vm.c173 pid_t pid; in vsyscall() local
176 pid = fork(); in vsyscall()
177 if (pid < 0) { in vsyscall()
181 if (pid == 0) { in vsyscall()
206 waitpid(pid, &wstatus, 0); in vsyscall()
216 static int test_proc_pid_maps(pid_t pid) in test_proc_pid_maps() argument
219 snprintf(buf, sizeof(buf), "/proc/%u/maps", pid); in test_proc_pid_maps()
238 static int test_proc_pid_numa_maps(pid_t pid) in test_proc_pid_numa_maps() argument
241 snprintf(buf, sizeof(buf), "/proc/%u/numa_maps", pid); in test_proc_pid_numa_maps()
261 static int test_proc_pid_smaps(pid_t pid) in test_proc_pid_smaps() argument
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/linux/tools/perf/util/
H A Dthread_map.c34 struct perf_thread_map *thread_map__new_by_pid(pid_t pid) in thread_map__new_by_pid() argument
42 sprintf(name, "/proc/%d/task", pid); in thread_map__new_by_pid()
96 pid_t pid = strtol(dirent->d_name, &end, 10); in thread_map__new_all_cpus() local
101 snprintf(path, sizeof(path), "/proc/%d/task", pid); in thread_map__new_all_cpus()
104 pr_debug("scandir for %d returned empty, skipping\n", pid); in thread_map__new_all_cpus()
151 struct perf_thread_map *thread_map__new(pid_t pid, pid_t tid) in thread_map__new() argument
153 if (pid != -1) in thread_map__new()
154 return thread_map__new_by_pid(pid); in thread_map__new()
166 pid_t pid, prev_pid = INT_MAX; in thread_map__new_by_pid_str() local
176 pid = strtol(pos->s, &end_ptr, 10); in thread_map__new_by_pid_str()
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