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/linux-6.12.1/include/linux/
Dpid.h55 struct pid struct
71 extern struct pid init_struct_pid; argument
75 struct pid *pidfd_pid(const struct file *file);
76 struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);
78 int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret);
81 static inline struct pid *get_pid(struct pid *pid) in get_pid() argument
83 if (pid) in get_pid()
84 refcount_inc(&pid->count); in get_pid()
85 return pid; in get_pid()
88 extern void put_pid(struct pid *pid);
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/linux-6.12.1/tools/testing/selftests/powerpc/ptrace/
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-6.12.1/kernel/
Dpid.c49 struct pid init_struct_pid = {
112 void put_pid(struct pid *pid) in put_pid() argument
116 if (!pid) in put_pid()
119 ns = pid->numbers[pid->level].ns; in put_pid()
120 if (refcount_dec_and_test(&pid->count)) { in put_pid()
121 kmem_cache_free(ns->pid_cachep, pid); in put_pid()
129 struct pid *pid = container_of(rhp, struct pid, rcu); in delayed_put_pid() local
130 put_pid(pid); in delayed_put_pid()
133 void free_pid(struct pid *pid) in free_pid() argument
140 for (i = 0; i <= pid->level; i++) { in free_pid()
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/linux-6.12.1/arch/x86/um/os-Linux/
Dregisters.c22 int save_i387_registers(int pid, unsigned long *fp_regs) in save_i387_registers() argument
24 if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0) in save_i387_registers()
29 int save_fp_registers(int pid, unsigned long *fp_regs) in save_fp_registers() argument
37 if (ptrace(PTRACE_GETREGSET, pid, NT_X86_XSTATE, &iov) < 0) in save_fp_registers()
42 return save_i387_registers(pid, fp_regs); in save_fp_registers()
45 int restore_i387_registers(int pid, unsigned long *fp_regs) in restore_i387_registers() argument
47 if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0) in restore_i387_registers()
52 int restore_fp_registers(int pid, unsigned long *fp_regs) in restore_fp_registers() argument
59 if (ptrace(PTRACE_SETREGSET, pid, NT_X86_XSTATE, &iov) < 0) in restore_fp_registers()
64 return restore_i387_registers(pid, fp_regs); in restore_fp_registers()
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/linux-6.12.1/tools/testing/selftests/powerpc/signal/
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-6.12.1/arch/powerpc/mm/book3s64/
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-6.12.1/tools/testing/selftests/rlimits/
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-6.12.1/arch/um/os-Linux/
Dstart_up.c35 int pid = os_getpid(), ppid = getppid(); in ptrace_child() local
41 kill(pid, SIGKILL); in ptrace_child()
43 kill(pid, SIGSTOP); in ptrace_child()
51 if (sc_result == pid) in ptrace_child()
98 int pid, n, status; in start_ptraced_child() local
102 pid = fork(); in start_ptraced_child()
103 if (pid == 0) in start_ptraced_child()
105 else if (pid < 0) in start_ptraced_child()
108 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); in start_ptraced_child()
115 return pid; in start_ptraced_child()
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Dhelper.c47 int pid, fds[2], ret, n; in run_helper() local
75 pid = clone(helper_child, (void *) sp, CLONE_VM, &data); in run_helper()
76 if (pid < 0) { in run_helper()
92 ret = pid; in run_helper()
100 CATCH_EINTR(waitpid(pid, NULL, __WALL)); in run_helper()
122 int pid, status, err; in run_helper_thread() local
129 pid = clone(proc, (void *) sp, flags, arg); in run_helper_thread()
130 if (pid < 0) { in run_helper_thread()
137 CATCH_EINTR(pid = waitpid(pid, &status, __WALL)); in run_helper_thread()
138 if (pid < 0) { in run_helper_thread()
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/linux-6.12.1/include/trace/events/
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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Dsched.h24 __field( pid_t, pid )
29 __entry->pid = t->pid;
32 TP_printk("comm=%s pid=%d", __entry->comm, __entry->pid)
149 __field( pid_t, pid )
156 __entry->pid = p->pid;
162 __entry->comm, __entry->pid, __entry->prio,
243 __entry->prev_pid = prev->pid;
247 __entry->next_pid = next->pid;
282 __field( pid_t, pid )
290 __entry->pid = p->pid;
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/linux-6.12.1/arch/powerpc/mm/nohash/
Dtlb.c130 unsigned int pid; in local_flush_tlb_mm() local
133 pid = mm->context.id; in local_flush_tlb_mm()
134 if (pid != MMU_NO_CONTEXT) in local_flush_tlb_mm()
135 _tlbil_pid(pid); in local_flush_tlb_mm()
143 unsigned int pid; in __local_flush_tlb_page() local
146 pid = mm ? mm->context.id : 0; in __local_flush_tlb_page()
147 if (pid != MMU_NO_CONTEXT) in __local_flush_tlb_page()
148 _tlbil_va(vmaddr, pid, tsize, ind); in __local_flush_tlb_page()
177 unsigned int pid; member
186 _tlbil_pid(p ? p->pid : 0); in do_flush_tlb_mm_ipi()
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/linux-6.12.1/tools/perf/scripts/perl/
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-6.12.1/arch/um/os-Linux/skas/
Dprocess.c29 int is_skas_winch(int pid, int fd, void *data) in is_skas_winch() argument
31 return pid == getpgrp(); in is_skas_winch()
82 static int ptrace_dump_regs(int pid) in ptrace_dump_regs() argument
87 if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) in ptrace_dump_regs()
109 void wait_stub_done(int pid) in wait_stub_done() argument
114 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED | __WALL)); in wait_stub_done()
121 err = ptrace(PTRACE_CONT, pid, 0, 0); in wait_stub_done()
133 err = ptrace_dump_regs(pid); in wait_stub_done()
138 __func__, pid, n, errno, status); in wait_stub_done()
144 static void get_skas_faultinfo(int pid, struct faultinfo *fi, unsigned long *aux_fp_regs) in get_skas_faultinfo() argument
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/linux-6.12.1/fs/
Dpidfs.c63 struct pid *pid = pidfd_pid(f); in pidfd_show_fdinfo() local
67 if (likely(pid_has_task(pid, PIDTYPE_PID))) { in pidfd_show_fdinfo()
69 nr = pid_nr_ns(pid, ns); in pidfd_show_fdinfo()
84 for (i = ns->level + 1; i <= pid->level; i++) in pidfd_show_fdinfo()
85 seq_put_decimal_ll(m, "\t", pid->numbers[i].nr); in pidfd_show_fdinfo()
97 struct pid *pid = pidfd_pid(file); in pidfd_poll() local
102 poll_wait(file, &pid->wait_pidfd, pts); in pidfd_poll()
108 task = pid_task(pid, PIDTYPE_PID); in pidfd_poll()
121 struct pid *pid = pidfd_pid(file); in pidfd_ioctl() local
128 task = get_pid_task(pid, PIDTYPE_PID); in pidfd_ioctl()
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/linux-6.12.1/tools/testing/selftests/cgroup/
Dcgroup_util.c294 int pid = strtol(ptr, &ptr, 10); in cg_killall() local
296 if (pid == 0) in cg_killall()
302 if (kill(pid, SIGKILL)) in cg_killall()
329 int cg_enter(const char *cgroup, int pid) in cg_enter() argument
333 snprintf(pidbuf, sizeof(pidbuf), "%d", pid); in cg_enter()
351 int pid, retcode; in cg_run() local
353 pid = fork(); in cg_run()
354 if (pid < 0) { in cg_run()
355 return pid; in cg_run()
356 } else if (pid == 0) { in cg_run()
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Dtest_freezer.c59 static int cg_enter_and_wait_for_frozen(const char *cgroup, int pid, in cg_enter_and_wait_for_frozen() argument
69 ret = cg_enter(cgroup, pid); in cg_enter_and_wait_for_frozen()
403 int pid; in test_cgfreezer_mkdir() local
422 pid = cg_run_nowait(child, child_fn, NULL); in test_cgfreezer_mkdir()
423 if (pid < 0) in test_cgfreezer_mkdir()
512 int pid; in test_cgfreezer_migrate() local
528 pid = cg_run_nowait(cgroup[0], child_fn, NULL); in test_cgfreezer_migrate()
529 if (pid < 0) in test_cgfreezer_migrate()
541 if (cg_enter_and_wait_for_frozen(cgroup[1], pid, true)) in test_cgfreezer_migrate()
550 if (cg_enter_and_wait_for_frozen(cgroup[0], pid, false)) in test_cgfreezer_migrate()
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/linux-6.12.1/drivers/gpu/drm/amd/amdkfd/
Dkfd_smi_events.c43 pid_t pid; member
163 static bool kfd_smi_ev_enabled(pid_t pid, struct kfd_smi_client *client, in kfd_smi_ev_enabled() argument
169 if (pid && client->pid != pid && !(client->suser && (events & all))) in kfd_smi_ev_enabled()
175 static void add_event_to_kfifo(pid_t pid, struct kfd_node *dev, in add_event_to_kfifo() argument
183 if (!kfd_smi_ev_enabled(pid, client, smi_event)) in add_event_to_kfifo()
200 static void kfd_smi_event_add(pid_t pid, struct kfd_node *dev, in kfd_smi_event_add() argument
216 add_event_to_kfifo(pid, dev, event, fifo_in, len); in kfd_smi_event_add()
257 if (task_info->pid) in kfd_smi_event_update_vmfault()
259 task_info->pid, task_info->task_name)); in kfd_smi_event_update_vmfault()
264 void kfd_smi_event_page_fault_start(struct kfd_node *node, pid_t pid, in kfd_smi_event_page_fault_start() argument
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/linux-6.12.1/tools/testing/selftests/bpf/progs/
Dtask_kfunc_common.h25 struct task_struct *bpf_task_from_pid(s32 pid) __ksym;
31 s32 pid; in tasks_kfunc_map_value_lookup() local
34 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_value_lookup()
38 return bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_value_lookup()
46 s32 pid; in tasks_kfunc_map_insert() local
48 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_insert()
53 status = bpf_map_update_elem(&__tasks_kfunc_map, &pid, &local, BPF_NOEXIST); in tasks_kfunc_map_insert()
57 v = bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
59 bpf_map_delete_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
/linux-6.12.1/arch/powerpc/mm/
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-6.12.1/Documentation/translations/zh_CN/accounting/
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-6.12.1/tools/testing/selftests/ptrace/
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-6.12.1/scripts/
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-6.12.1/drivers/media/common/b2c2/
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-6.12.1/tools/testing/selftests/clone3/
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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