linux-kernel - Q: do_notify_parent/do_notify_parent_cldstop && info.si

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Message-ID: <20090526211306.GA7065@redhat.com>
Date:	Tue, 26 May 2009 23:13:06 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Roland McGrath <roland@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Q: do_notify_parent/do_notify_parent_cldstop && info.si_xtime

do_notify_parent() reports .si_Xtime = tsk->Xtime + signal->Xtime,
but do_notify_parent_cldstop() uses .si_Xtime =  tsk->Xtime.

Is this right?

Yes, tsk->Xtime + signal->Xtime does not make much sense for
do_notify_parent_cldstop(), but reporting group_leader->Xtime
(if not traced) doesn't look very right too. IOW, perhaps we
need thread_group_cputime() here?

Ole.

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