[Devel] Re: [PATCH 15/15] Hooks over the code to show correct values to user

[Pavel Emelyanov]

Oleg Nesterov wrote:
> On 07/26, Pavel Emelyanov wrote:
>> int
>> kill_proc(pid_t pid, int sig, int priv)
>> {
>> -	return kill_proc_info(sig, __si_special(priv), pid);
>> +	int ret;
>> +
>> +	rcu_read_lock();
>> +	ret = kill_pid_info(sig, __si_special(priv), find_pid(pid));
>> +	rcu_read_unlock();
>> +	return ret;
>> }
> 
> I think this is wrong. kill_proc() should behave the same as kill_proc_info(),
> so this change is not needed. With this patch they use different namespaces
> to find the task, this is not consistent.

Actually, callers of this use tsk->pid (global pid) as an argument, so
find_vpid() might return wrong value.

> (sadly, this patch is huge, very difficult to review).

This is *very* huge, but all it does is just replace tsk->pid, find_task_by_pid,
pd_nr, etc with appropriate task_pid_nr(), pid_nr_ns() and find_task_by_vpid() etc.

> Oleg.

Thanks,
Pavel