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/linux-6.14.4/include/linux/
Dpid.h13 * What is struct pid?
15 * A struct pid is the kernel's internal notion of a process identifier.
17 * there are processes attached to it the struct pid lives in a hash
19 * quickly from the numeric pid value. The attached processes may be
20 * quickly accessed by following pointers from struct pid.
23 * problem. The process originally with that pid may have exited and the
24 * pid allocator wrapped, and another process could have come along
25 * and been assigned that pid.
32 * a struct pid is about 64 bytes.
34 * Holding a reference to struct pid solves both of these problems.
[all …]
/linux-6.14.4/kernel/
Dpid.c3 * Generic pidhash and scalable, time-bounded PID allocator
9 * pid-structures are backing objects for tasks sharing a given ID to chain
17 * We have a list of bitmap pages, which bitmaps represent the PID space.
23 * Pid namespaces:
50 struct pid init_struct_pid = {
68 * PID-map pages start out as NULL, they get allocated upon
108 void put_pid(struct pid *pid) in put_pid() argument
112 if (!pid) in put_pid()
115 ns = pid->numbers[pid->level].ns; in put_pid()
116 if (refcount_dec_and_test(&pid->count)) { in put_pid()
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/linux-6.14.4/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-6.14.4/fs/
Dpidfs.c9 #include <linux/pid.h>
58 struct pid *pid_a = rb_entry(a, struct pid, pidfs_node); in pidfs_ino_cmp()
59 struct pid *pid_b = rb_entry(b, struct pid, pidfs_node); in pidfs_ino_cmp()
70 void pidfs_add_pid(struct pid *pid) in pidfs_add_pid() argument
76 * to struct pid is the inode number. in pidfs_add_pid()
78 * On 32 bit the 64 bit number assigned to struct pid is split in pidfs_add_pid()
102 pid->ino = pidfs_ino_nr; in pidfs_add_pid()
103 pid->stashed = NULL; in pidfs_add_pid()
107 rb_find_add_rcu(&pid->pidfs_node, &pidfs_ino_tree, pidfs_ino_cmp); in pidfs_add_pid()
111 void pidfs_remove_pid(struct pid *pid) in pidfs_remove_pid() argument
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/linux-6.14.4/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-6.14.4/include/trace/events/
Doom.h19 __field( pid_t, pid)
25 __entry->pid = task->pid;
30 TP_printk("pid=%d comm=%s oom_score_adj=%hd",
31 __entry->pid, __entry->comm, __entry->oom_score_adj)
82 __field(int, pid)
94 __entry->pid = task->pid;
105 …TP_printk("pid=%d comm=%s total-vm=%lukB anon-rss=%lukB file-rss:%lukB shmem-rss:%lukB uid=%u pgta…
106 __entry->pid,
119 TP_PROTO(int pid),
121 TP_ARGS(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;
161 TP_printk("comm=%s pid=%d prio=%d target_cpu=%03d",
162 __entry->comm, __entry->pid, __entry->prio,
243 __entry->prev_pid = prev->pid;
247 __entry->next_pid = next->pid;
282 __field( pid_t, pid )
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/linux-6.14.4/tools/testing/selftests/clone3/
Dclone3_set_tid.c6 * PID namespace.
45 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()
66 ksft_print_msg("I am the child, my PID is %d (expected %d)\n", in call_clone3_set_tid()
96 if (expected_pid == 0 || expected_pid == pid) { in call_clone3_set_tid()
97 ksft_print_msg("I am the parent (%d). My child's pid is %d\n", in call_clone3_set_tid()
98 getpid(), pid); in call_clone3_set_tid()
101 "Expected child pid %d does not match actual pid %d\n", in call_clone3_set_tid()
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/linux-6.14.4/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-6.14.4/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-6.14.4/tools/testing/selftests/pid_namespace/
Dpid_max.c40 pid_t pid; in pid_max_cb() local
69 pid = fork(); in pid_max_cb()
70 if (pid == 0) in pid_max_cb()
72 wait_for_pid(pid); in pid_max_cb()
73 if (pid > 500) { in pid_max_cb()
74 fprintf(stderr, "Managed to create pid number beyond limit\n"); in pid_max_cb()
131 fprintf(stderr, "Managed to create process even though ancestor pid namespace had a limit\n"); in pid_max_nested_inner()
137 pid_t pid; in pid_max_nested_inner() local
139 pid = fork(); in pid_max_nested_inner()
140 if (pid < 0) in pid_max_nested_inner()
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/linux-6.14.4/kernel/trace/
Dpid_list.c93 static inline int pid_split(unsigned int pid, unsigned int *upper1, in pid_split() argument
99 /* In case a bad pid is passed in, then fail */ in pid_split()
100 if (unlikely(pid >= MAX_PID)) in pid_split()
103 *upper1 = (pid >> UPPER1_SHIFT) & UPPER_MASK; in pid_split()
104 *upper2 = (pid >> UPPER2_SHIFT) & UPPER_MASK; in pid_split()
105 *lower = pid & LOWER_MASK; in pid_split()
119 * trace_pid_list_is_set - test if the pid is set in the list
120 * @pid_list: The pid list to test
121 * @pid: The pid to see if set in the list.
123 * Tests if @pid is set in the @pid_list. This is usually called
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/linux-6.14.4/scripts/gdb/linux/
Dtasks.py38 def get_task_by_pid(pid): argument
40 if int(task['pid']) == pid:
46 """Find Linux task by PID and return the task_struct variable.
48 $lx_task_by_pid(PID): Given PID, iterate over all tasks of the target and
49 return that task_struct variable which PID matches."""
54 def invoke(self, pid): argument
55 task = get_task_by_pid(pid)
59 raise gdb.GdbError("No task of PID " + str(pid))
72 gdb.write("{:>10} {:>12} {:>7}\n".format("TASK", "PID", "COMM"))
76 task["pid"].format_string(),
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/linux-6.14.4/arch/um/os-Linux/
Dstart_up.c35 int pid = os_getpid(), ppid = getppid(); in ptrace_child() local
41 kill(pid, SIGKILL); in ptrace_child()
43 kill(pid, SIGSTOP); in ptrace_child()
51 if (sc_result == pid) in ptrace_child()
98 int pid, n, status; in start_ptraced_child() local
102 pid = fork(); in start_ptraced_child()
103 if (pid == 0) in start_ptraced_child()
105 else if (pid < 0) in start_ptraced_child()
108 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); in start_ptraced_child()
115 return pid; in start_ptraced_child()
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/linux-6.14.4/tools/testing/selftests/ftrace/test.d/trigger/inter-event/
Dtrigger-inter-event-combined-hist.tc13 echo 'waking_latency u64 lat pid_t pid' > synthetic_events
20 echo 'hist:keys=pid:ts0=common_timestamp.usecs if comm=="ping"' > events/sched/sched_waking/trigger
21 echo 'hist:keys=pid:waking_lat=common_timestamp.usecs-$ts0:onmatch(sched.sched_waking).waking_laten…
22 echo 'hist:keys=pid,lat:sort=pid,lat' > events/synthetic/waking_latency/trigger
24 echo 'wakeup_latency u64 lat pid_t pid' >> synthetic_events
25 echo 'hist:keys=pid:ts1=common_timestamp.usecs if comm=="ping"' >> events/sched/sched_wakeup/trigger
28 echo 'waking_plus_wakeup_latency u64 lat; pid_t pid' >> synthetic_events
29 …ho 'hist:keys=pid,lat:sort=pid,lat:ww_lat=$waking_lat+$wakeup_lat:onmatch(synthetic.wakeup_latency…
30 echo 'hist:keys=pid,lat:sort=pid,lat' >> events/synthetic/waking_plus_wakeup_latency/trigger
33 if ! grep -q "pid:" events/synthetic/waking_plus_wakeup_latency/hist; then
/linux-6.14.4/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
[all …]
/linux-6.14.4/drivers/media/common/b2c2/
Dflexcop-hw-filter.c4 * flexcop-hw-filter.c - pid and mac address filtering and control functions
47 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()
61 /* this fancy define reduces the code size of the quite similar PID controlling of
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
[all …]
/linux-6.14.4/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-6.14.4/tools/perf/scripts/perl/
Drw-by-pid.pl75 printf("read counts by pid:\n\n");
77 printf("%6s %20s %10s %10s %10s\n", "pid", "comm",
82 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,
93 printf("\nfailed reads by pid:\n\n");
95 printf("%6s %20s %6s %10s\n", "pid", "comm", "error #", "# errors");
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/linux-6.14.4/include/uapi/linux/dvb/
Ddmx.h60 * @DMX_PES_AUDIO0: first audio PID. Also referred as @DMX_PES_AUDIO.
61 * @DMX_PES_VIDEO0: first video PID. Also referred as @DMX_PES_VIDEO.
62 * @DMX_PES_TELETEXT0: first teletext PID. Also referred as @DMX_PES_TELETEXT.
63 * @DMX_PES_SUBTITLE0: first subtitle PID. Also referred as @DMX_PES_SUBTITLE.
64 * @DMX_PES_PCR0: first Program Clock Reference PID.
67 * @DMX_PES_AUDIO1: second audio PID.
68 * @DMX_PES_VIDEO1: second video PID.
69 * @DMX_PES_TELETEXT1: second teletext PID.
70 * @DMX_PES_SUBTITLE1: second subtitle PID.
71 * @DMX_PES_PCR1: second Program Clock Reference PID.
[all …]
/linux-6.14.4/tools/testing/selftests/pidfd/
Dpidfd_test.c96 pid_t pid; in test_pidfd_send_signal_exited_fail() local
106 pid = fork(); in test_pidfd_send_signal_exited_fail()
107 if (pid < 0) in test_pidfd_send_signal_exited_fail()
111 if (pid == 0) in test_pidfd_send_signal_exited_fail()
114 snprintf(buf, sizeof(buf), "/proc/%d", pid); in test_pidfd_send_signal_exited_fail()
118 ret = wait_for_pid(pid); in test_pidfd_send_signal_exited_fail()
156 const char *test_name = "pidfd_send_signal signal recycled pid"; in test_pidfd_send_signal_recycled_pid_fail()
168 ksft_test_result_skip("%s test: Unsharing pid namespace not permitted\n", in test_pidfd_send_signal_recycled_pid_fail()
172 ksft_exit_fail_msg("%s test: Failed to unshare pid namespace\n", in test_pidfd_send_signal_recycled_pid_fail()
192 /* pid 1 in new pid namespace */ in test_pidfd_send_signal_recycled_pid_fail()
[all …]
/linux-6.14.4/tools/perf/scripts/python/
Dnetdev-times.py142 event['pid'], event['comm']))
232 def irq__softirq_entry(name, context, cpu, sec, nsec, pid, comm, callchain, vec): argument
235 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
238 def irq__softirq_exit(name, context, cpu, sec, nsec, pid, comm, callchain, vec): argument
241 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
244 def irq__softirq_raise(name, context, cpu, sec, nsec, pid, comm, callchain, vec): argument
247 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm, vec)
250 def irq__irq_handler_entry(name, context, cpu, sec, nsec, pid, comm, argument
252 event_info = (name, context, cpu, nsecs(sec, nsec), pid, comm,
256 def irq__irq_handler_exit(name, context, cpu, sec, nsec, pid, comm, callchain, irq, ret): argument
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/linux-6.14.4/arch/powerpc/platforms/powernv/
Dvas-trace.h24 __field(int, pid)
34 __entry->pid = tsk->pid;
42 TP_printk("pid=%d, vasid=%d, cop=%d, lpid=%d, pid=%d, tid=%d",
43 __entry->pid, __entry->vasid, __entry->cop,
59 __field(int, pid)
68 __entry->pid = tsk->pid;
75 TP_printk("pid=%d, vasid=%d, cop=%d, lpid=%d, pidr=%d",
76 __entry->pid, __entry->vasid, __entry->cop,
90 __field(int, pid)
97 __entry->pid = tsk->pid;
[all …]
/linux-6.14.4/tools/testing/selftests/bpf/progs/
Dtask_kfunc_common.h25 struct task_struct *bpf_task_from_pid(s32 pid) __ksym;
32 s32 pid; in tasks_kfunc_map_value_lookup() local
35 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_value_lookup()
39 return bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_value_lookup()
47 s32 pid; in tasks_kfunc_map_insert() local
49 status = bpf_probe_read_kernel(&pid, sizeof(pid), &p->pid); in tasks_kfunc_map_insert()
54 status = bpf_map_update_elem(&__tasks_kfunc_map, &pid, &local, BPF_NOEXIST); in tasks_kfunc_map_insert()
58 v = bpf_map_lookup_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
60 bpf_map_delete_elem(&__tasks_kfunc_map, &pid); in tasks_kfunc_map_insert()
/linux-6.14.4/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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