netdev - Re: Hitting slab BUG with bridging/cxgb3 on 2.6.31-rc2

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Message-ID: <adaab3eza9c.fsf@cisco.com>
Date:	Wed, 08 Jul 2009 22:38:23 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Divy Le Ray <divy@...lsio.com>
Cc:	netdev@...r.kernel.org
Subject: Re: Hitting slab BUG with bridging/cxgb3 on 2.6.31-rc2


 > Yep, reverting that makes things work solid.  I don't see an obvious
 > problem with that patch... seems the only places that free TX skbs are
 > the xmit routine itself, and in sge_timer_tx() where it's protected by
 > doing __netif_tx_lock().

Looking a little deeper -- it seems that at least the msix interrupt
routines do look at txq stuff without taking the tx_lock, and possibly
wake the tx queue racily maybe....

Oh well, I'll let you stare at it a little now...

 - R.
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