Messages in this thread | | | Date | Mon, 3 Apr 2017 20:12:52 +0200 | From | Oleg Nesterov <> | Subject | Re: [RFC][PATCH 2/2] exec: If possible don't wait for ptraced threads to be reaped |
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On 04/02, Eric W. Biederman wrote: > > Oleg Nesterov <oleg@redhat.com> writes: > > > And btw zap_other_threads(may_hang == 0) is racy. Either you need tasklist or > > exit_notify() should set tsk->exit_state under siglock, otherwise zap() can > > return the wrong count. > > zap_other_thread(tsk, 0) only gets called in the case where we don't > care about the return value. It does not get called from fs/exec.c
I meant that may_hang == 0 implies zap_other_threads(do_count => -1) which should return the number of threads which didn't pass exit_notify(). The returned value can be wrong unless you change exit_notify() to set exit_state under siglock.
Oleg.
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