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

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Message-ID: <20080930145710.GB2511@ami.dom.local>
Date:	Tue, 30 Sep 2008 16:57:10 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Benjamin Thery <benjamin.thery@...l.net>
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

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.

Jarek P.
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