From: James Chapman <jchapman@katalix•com>
To: Jarek Poplawski <jarkao2@gmail•com>
Cc: David Miller <davem@davemloft•net>, netdev@vger•kernel.org
Subject: Re: [PATCH][PPPOL2TP]: Fix SMP oops in pppol2tp driver
Date: Tue, 19 Feb 2008 09:09:38 +0000 [thread overview]
Message-ID: <47BA9CD2.5030507@katalix.com> (raw)
In-Reply-To: <20080218230154.GB6373@ami.dom.local>
Jarek Poplawski wrote:
> On Mon, Feb 18, 2008 at 10:09:24PM +0000, James Chapman wrote:
>> Jarek Poplawski wrote:
>>> Hi,
>>>
>>> It seems, this nice report is still uncomplete: could you check if
>>> there could have been something more yet?
>> Unfortunately the ISP's syslog stops. But I've been able to borrow two
>> Quad Xeon boxes and have reproduced the problem.
>>
>> Here's a new version of the patch. The patch avoids disabling irqs and
>> fixes the sk_dst_get() usage that DaveM mentioned. But even with this
>> patch, lockdep still complains if hundreds of ppp sessions are inserted
>> into a tunnel as rapidly as possible (lockdep trace is below). I can
>> stop these errors by wrapping the call to ppp_input() in
>> pppol2tp_recv_dequeue_skb() with local_irq_save/restore. What is a
>> better fix?
>
> Hmm... This is a really long report and quite a bit different from
> the previous one. I need some time for this. BTW: you sent before a
> lockdep report with hlist_lock problem. I think this could be fixed
> in some independent patch to make this all more readable. Are all
> the other changes in this current patch only because of this or
> previous lockdep report or for some other reasons (or reports) yet?
As I mentioned in my reply to davem, modifying the pppol2tp driver as
described in the patch I sent made the original lockdep problems go away.
--
James Chapman
Katalix Systems Ltd
http://www.katalix.com
Catalysts for your Embedded Linux software development
next prev parent reply other threads:[~2008-02-19 9:09 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-11 9:22 [PATCH][PPPOL2TP]: Fix SMP oops in pppol2tp driver James Chapman
2008-02-11 18:57 ` Jarek Poplawski
2008-02-11 22:19 ` James Chapman
2008-02-11 22:49 ` Jarek Poplawski
2008-02-11 22:55 ` Jarek Poplawski
2008-02-11 23:42 ` James Chapman
2008-02-12 10:42 ` Jarek Poplawski
2008-02-11 23:41 ` James Chapman
2008-02-12 5:30 ` David Miller
2008-02-12 10:58 ` James Chapman
2008-02-12 13:24 ` Jarek Poplawski
2008-02-13 6:00 ` David Miller
2008-02-13 7:29 ` Jarek Poplawski
2008-02-14 13:00 ` Jarek Poplawski
2008-02-18 22:09 ` James Chapman
2008-02-18 23:01 ` Jarek Poplawski
2008-02-19 9:09 ` James Chapman [this message]
2008-02-19 4:29 ` David Miller
2008-02-19 9:03 ` James Chapman
2008-02-19 10:30 ` Jarek Poplawski
2008-02-19 10:36 ` Jarek Poplawski
2008-02-19 14:37 ` James Chapman
2008-02-19 23:06 ` Jarek Poplawski
2008-02-19 23:28 ` Jarek Poplawski
2008-02-20 16:02 ` James Chapman
2008-02-20 18:38 ` Jarek Poplawski
2008-02-20 22:37 ` James Chapman
2008-02-21 8:59 ` Jarek Poplawski
2008-02-21 9:53 ` James Chapman
2008-02-21 12:08 ` Jarek Poplawski
2008-02-21 17:09 ` Jarek Poplawski
2008-02-25 12:19 ` James Chapman
2008-02-25 13:05 ` Jarek Poplawski
2008-02-25 13:39 ` Jarek Poplawski
2008-02-25 14:02 ` Jarek Poplawski
2008-02-25 21:58 ` Jarek Poplawski
2008-02-26 12:14 ` James Chapman
2008-02-26 13:03 ` Jarek Poplawski
2008-02-26 13:18 ` Jarek Poplawski
2008-02-26 20:00 ` Jarek Poplawski
2008-03-02 20:29 ` James Chapman
2008-03-03 8:22 ` Jarek Poplawski
2008-03-03 9:35 ` Jarek Poplawski
2008-02-27 10:54 ` [PATCH][PPPOL2TP] add missing sock_put() in pppol2tp_recv_dequeue() Jarek Poplawski
2008-03-02 20:31 ` James Chapman
2008-03-04 4:49 ` David Miller
2008-02-27 11:48 ` [PATCH][PPPOL2TP] add missing sock_put() in pppol2tp_tunnel_closeall() Jarek Poplawski
2008-03-02 20:32 ` James Chapman
2008-03-04 4:49 ` David Miller
2008-02-22 14:16 ` [PATCH][NET] sock.c: sk_dst_lock lockdep keys and names per af_family Jarek Poplawski
2008-02-12 7:19 ` [PATCH][PPPOL2TP]: Fix SMP oops in pppol2tp driver Jarek Poplawski
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