On Tue, 12 Apr 2005, Tarhon-Onu Victor wrote:
So the problem should be looked in that changes to the pkt sched API,
the patch containing only those changes is at
The bug is in this portion of code from net/sched/sch_generic.c,
in the qdisc_destroy() function:
==
list_for_each_entry(cq, &cql, list)
list_for_each_entry_safe(q, n, &qdisc->dev->qdisc_list, list)
if (TC_H_MAJ(q->parent) == TC_H_MAJ(cq->handle)) {
if (q->ops->cl_ops == NULL)
list_del_init(&q->list);
else
list_move_tail(&q->list, &cql);
}
list_for_each_entry_safe(cq, n, &cql, list)
list_del_init(&cq->list);
==
...and it happens when q->ops->cl_ops is NULL and
list_del_init(&q->list) is executed.
The stuff from include/linux/list.h looks ok, it seems like one
of those two iterations (list_for_each_entry() and
list_for_each_entry_safe()) enters an endless loop when an element is
removed from the list under some circumstances.
--
Tarhon-Onu Victor
Area Technical Coordinator
RDS Iasi - Network Operations Center
www.rdsnet.ro, www.rdstel.ro, www.rdslink.ro
Phone: +40-232-218385; Fax: +40-232-260099
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