Re: [PATCH 01/23] tref: Implement task references.

[Oleg Nesterov]

Oleg Nesterov wrote:
> 
>         void put_pid_ref(struct pid_ref *ref)
>         {
>                 if (!ref || !atomic_dec_and_test(&ref->count))
>                         return;
> 
>                 write_lock_irq(&tasklist_lock);
>                 if (!atomic_read(&ref->count)) {

Ok, this is racy, but the fix is possible.

Oleg.
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