tools/oomkill: Use task_struct->tgid as PID

The OOM target PID should be task_struct->tgid.

Signed-off-by: Hengqi Chen <[email protected]>

tools/oomkill.py

@@ -37,12 +37,12 @@
 
 void kprobe__oom_kill_process(struct pt_regs *ctx, struct oom_control *oc, const char *message)
 {
- unsigned long totalpages;
  struct task_struct *p = oc->chosen;
  struct data_t data = {};
  u32 pid = bpf_get_current_pid_tgid() >> 32;
+
  data.fpid = pid;
- data.tpid = p->pid;
+ data.tpid = p->tgid;
  data.pages = oc->totalpages;
  bpf_get_current_comm(&data.fcomm, sizeof(data.fcomm));
  bpf_probe_read_kernel(&data.tcomm, sizeof(data.tcomm), p->comm);