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From: Thomas Graf <tgraf@suug.ch>
To: Patrick McHardy <kaber@trash.net>
Cc: davem@davemloft.net, netdev@oss.sgi.com, spam@crocom.com.pl,
	kuznet@ms2.inr.ac.ru, jmorris@redhat.com
Subject: Re: [PATCH] PKT_SCHED: Initialize list field in dummy qdiscs
Date: Sat, 6 Nov 2004 02:59:31 +0100	[thread overview]
Message-ID: <20041106015931.GA28715@postel.suug.ch> (raw)
In-Reply-To: <418C2D40.9020300@trash.net>

* Patrick McHardy <418C2D40.9020300@trash.net> 2004-11-06 02:47
> Nice work, I was really beginning to wonder. There's not that
> much that touches qdisc_list :)

Which might have been the problem, I've been focusing on this for
hours overlooking the obvious. The bug report was very well done,
maybe too good so I was at the root of the problem too fast. ;->

> The __qdisc_destroy rcu-callback is called in softirq context, when
> destroying a classful qdisc the qdisc destroy function might call
> qdisc_destroy again for an inner class.

Ahh... of course. I was looking through all callers of destroy multiple
times but somehow I managed to overlook the one in __qdisc_destroy
over and over.  Thanks!

> >I guess I'm missing that little bit of experience but it would
> >help to use _rcu list variantes, would it?
> >
> Yes. Are you going to send a patch ?

Sure, tomorrow, if nobody preempts. I need some rest.

  reply	other threads:[~2004-11-06  1:59 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-11-05  9:48 PROBLEM: IProute hangs after running traffic shaping scripts Szymon Miotk
2004-11-05 11:54 ` Thomas Graf
2004-11-05 14:16 ` [PATCH] PKT_SCHED: Initialize list field in dummy qdiscs Thomas Graf
2004-11-05 16:12   ` Patrick McHardy
2004-11-05 16:39     ` Thomas Graf
2004-11-05 17:26       ` Patrick McHardy
2004-11-05 17:58         ` Thomas Graf
2004-11-05 18:18           ` Patrick McHardy
2004-11-05 19:43             ` Thomas Graf
2004-11-06  1:18               ` Thomas Graf
2004-11-06  1:47                 ` Patrick McHardy
2004-11-06  1:59                   ` Thomas Graf [this message]
2004-11-06 14:50                     ` Thomas Graf
2004-11-07  8:57                       ` Patrick McHardy
2004-11-07 14:00                         ` Thomas Graf
2004-11-07 16:19                           ` Patrick McHardy
2004-11-07 16:33                             ` Thomas Graf
2004-11-07 17:02                               ` Patrick McHardy
2004-11-07 17:49                                 ` Thomas Graf
2004-11-07 18:22                                   ` Patrick McHardy
2004-11-07 19:08                                     ` Thomas Graf
2004-11-06  0:36           ` David S. Miller
2004-11-07 22:22 ` PROBLEM: IProute hangs after running traffic shaping scripts Patrick McHardy
2004-11-08  1:40   ` Patrick McHardy
2004-11-08 13:54     ` Thomas Graf
2004-11-08 16:12       ` Patrick McHardy
2004-11-08 18:33         ` Thomas Graf
2004-11-08 19:46           ` Patrick McHardy
2004-11-08 20:15             ` Thomas Graf
2004-11-10  0:18             ` David S. Miller
2004-11-10  0:40               ` Patrick McHardy
2004-11-10  0:55                 ` Patrick McHardy
2004-11-10  6:13                   ` David S. Miller
2004-11-10 12:08             ` Szymon Miotk

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