On 06/12, Ingo Molnar wrote:
>
> * Linus Torvalds <torva...@linux-foundation.org> wrote:
>
> > So I think the only issue is that ->mm can become NULL when the thread group
> > leader dies - a non-NULL mm should always be shared among all threads.
>
> Indeed, we do that in exit_mm().
Yes,
> So we could add tsk->mm_leader or so,
No, no, please do not. Just do something like
for_each_process(p) {
for_each_thread(p, t) {
if (t->mm) {
do_something(t->mm);
break;
}
}
}
But either way I don't understand what protects this ->mm. Perhaps this needs
find_lock_task_mm().
Oleg.
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