netdev - Re: [PATCH net-next V3 1/2] IB/ipoib: Add rtnl_link

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Message-ID: <CAKoUAr=8zZA9EgvJEVrd0a-Uw=zzksHj+5P2Sp3Lb4vXgSJRYA@mail.gmail.com>
Date:	Wed, 12 Sep 2012 17:53:32 +0300
From:	Rami Rosen <roszenrami@...il.com>
To:	Or Gerlitz <ogerlitz@...lanox.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	Shlomo Pongratz <shlomop@...lanox.com>
Subject: Re: [PATCH net-next V3 1/2] IB/ipoib: Add rtnl_link_ops support

Hi,

>From the dump of CPU #1, it seems indeed not related at all to "modprobe -r".

Could it be that there is some IB stack sysfs write activity?
(regardless of the modprobe -r" you issued) ?  I see some candidates
for it.

delete_child() is a method of the IB stack (ipoib/ipoib_main.c)

Maybe in order to help debug the problem, you might try to add in
delete_child() method, print of the name of the attribute which is
being deleted ?

  (struct device_attribute has a a member "struct attribute attr",
which in turn has  "const char *name").

Regards,
Rami Rosen
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