Re: do_syslog/__down_trylock lockup in current BK

From: Ingo Molnar (mingo@elte.hu)
Date: Mon Sep 09 2002 - 15:43:51 EST


the following assert triggers and catches the lockup:

--- linux/kernel/exit.c.orig Mon Sep 9 21:59:24 2002
+++ linux/kernel/exit.c Mon Sep 9 22:38:44 2002
@@ -461,6 +461,8 @@
                 ptrace_unlink (p);
 
                 list_del_init(&p->sibling);
+ if (p->parent == father && p->parent == p->real_parent)
+ BUG();
                 p->parent = p->real_parent;
                 list_add_tail(&p->sibling, &p->parent->children);
         }

so somehow we can end up having parent == real_parent?

        Ingo

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