netdev - Re: [PATCH] net: deadlock during net device unregistration

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Message-ID: <48E24341.5050609@bull.net>
Date:	Tue, 30 Sep 2008 17:18:25 +0200
From:	Benjamin Thery <benjamin.thery@...l.net>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Daniel Lezcano <dlezcano@...ibm.com>
Subject: Re: [PATCH] net: deadlock during net device unregistration

Jarek Poplawski wrote:
> On Tue, Sep 30, 2008 at 04:42:04PM +0200, Jarek Poplawski wrote:
>> Benjamin Thery wrote, On 09/30/2008 01:52 PM:
> ...
>>> I'm still looking at why the first dst_free() on those particular routes 
>>> doesn't call dst_destroy() immediately but defers it (another refcount
>>> on the route itself).
>> Yes, finding/fixing this, if possible, in this place looks like the
>> most consistent with the way netdev_wait_allrefs() is handling this.
> 
> Actually, I wonder, why we can't simply run this dst_gc_task() from
> dst_dev_event() (after cancelling the work) when needed.
> 

Um... I haven't thought about this. I'll have a look to see if it can
solve our issue.


Benjamin

> Jarek P.
> 
> 


-- 
B e n j a m i n   T h e r y  - BULL/DT/Open Software R&D

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