Author: kib
Date: Mon Apr 20 14:34:55 2009
New Revision: 191313
URL: http://svn.freebsd.org/changeset/base/191313
Log:
On the exit of the child process which parent either set SA_NOCLDWAIT
or ignored SIGCHLD, unconditionally wake up the parent instead of doing
this only when the child is a last child.
This brings us in line with other U**xes that support SA_NOCLDWAIT. If
the parent called waitpid(childpid), then exit of the child should wake
up the parent immediately instead of forcing it to wait for all children
to exit.
Reported by: Alan Ferrency <alan pair com>
Submitted by: Jilles Tjoelker <jilles stack nl>
PR: 108390
MFC after: 2 weeks
Modified:
head/sys/kern/kern_exit.c
Modified: head/sys/kern/kern_exit.c
==============================================================================
--- head/sys/kern/kern_exit.c Mon Apr 20 13:53:40 2009 (r191312)
+++ head/sys/kern/kern_exit.c Mon Apr 20 14:34:55 2009 (r191313)
@@ -504,13 +504,13 @@ exit1(struct thread *td, int rv)
proc_reparent(p, initproc);
p->p_sigparent = SIGCHLD;
PROC_LOCK(p->p_pptr);
+
/*
- * If this was the last child of our parent, notify
- * parent, so in case he was wait(2)ing, he will
+ * Notify parent, so in case he was wait(2)ing or
+ * executiing waitpid(2) with our pid, he will
* continue.
*/
- if (LIST_EMPTY(&pp->p_children))
- wakeup(pp);
+ wakeup(pp);
} else
mtx_unlock(&p->p_pptr->p_sigacts->ps_mtx);
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