linux-kernel - Re: linux-next: Tree for Apr 18 [ call-trace: drm | x86 | smp

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Message-ID: <20130419213953.GN3479@linux.vnet.ibm.com>
Date:	Fri, 19 Apr 2013 14:39:54 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Sedat Dilek <sedat.dilek@...il.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Rik van Riel <riel@...riel.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next <linux-next@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul McKenney <paul.mckenney@...aro.org>,
	DRI <dri-devel@...ts.freedesktop.org>,
	Dave Airlie <airlied@...hat.com>,
	Emmanuel Benisty <benisty.e@...il.com>
Subject: Re: linux-next: Tree for Apr 18 [ call-trace: drm | x86 | smp | rcu
 related? ]

On Fri, Apr 19, 2013 at 02:24:10PM -0700, Linus Torvalds wrote:
> On Fri, Apr 19, 2013 at 2:09 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> >
> > I have applied all three patches and see still call-traces.
> > New are apparmor related messages.
> 
> Can you try the crazy rcu double-free debug hack?
> 
> See
> 
>     https://lkml.org/lkml/2013/3/30/113
> 
> and I'm re-attaching the ugly-ass crazy hack patch here too..
> 
>                     Linus

For whatever it is worth, CONFIG_DEBUG_OBJECTS_RCU_HEAD=y is intended to
detect RCU double-freeing.  But if it isn't helping for whatever reason,
please let me know!

							Thanx, Paul

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