Messages in this thread | | | Date | Wed, 03 Dec 2003 00:18:08 +0100 | From | Patrick McHardy <> | Subject | Re: [netfilter-core] 2.4.23/others and ip_conntrack causing hangs |
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Rusty Russell wrote:
>>Perhaps in dev_queue_xmit ? Otherwise packets stuck in queues hold >>references to conntracks. Loopback traffic might cause some trouble >>because the "previously seen?" expection in ip_conntrack_core wouldn't >>work anymore. >> >> > >But I wouldn't expect packets there to be held indefinitely, so I >never worried about it. > >
A prio qdisc for example can hold packets indefinitely as long as a higher prio flow is active. I actually experienced problems unloading ip_conntrack while playing with qdiscs until I removed the qdisc, but I hacked some stuff before so it could be my own fault (and sometimes removing the qdisc didn't help either). Anyways, it may be a corner case but I'm pretty sure there are no lost references in ip_conntrack itself so maybe some of the sporadic reports of hanging unload could be explained by this. I'm going to do some more testing and then we can see.
Best regards, Patrick
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