c
I would like to iterate all the tasks in the kernel (threads and processes) and print tid/pid and name using for_each_process macro:
#define for_each_process(p)
for (p = &init_task ; (p = next_task(p)) != &init_task ; )
How can I distinguish between thread and process?
So I'll print it like that:
if (p->real_parent->pid == NULL)
printk("PROCESS: name: %s pid: %d n",p->comm,p->pid);
else
printk("THREAD: name: %s tid: %d n",p->comm,p->pid);
The following macros are what you need:
/*
* Careful: do_each_thread/while_each_thread is a double loop so
* 'break' will not work as expected - use goto instead.
*/
#define do_each_thread(g, t)
for (g = t = &init_task ; (g = t = next_task(g)) != &init_task ; ) do
#define while_each_thread(g, t)
while ((t = next_thread(t)) != g)
Use them like this:
rcu_read_lock();
do_each_thread(g, t) {
//...
} while_each_thread(g, t);
rcu_read_unlock();
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