linux-kernel - Re: [patch 03/18] fork: Move thread info gfp flags to header

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Date:	Mon, 7 May 2012 06:38:36 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch 03/18] fork: Move thread info gfp flags to header

On Sun, May 06, 2012 at 09:34:01PM -0700, Paul E. McKenney wrote:
> On Sat, May 05, 2012 at 03:05:41PM -0000, Thomas Gleixner wrote:
> > These flags can be useful for extra allocations outside of the core
> > code.
> > 
> > Add __GFP_NOTRACE to them, so the archs which have kmemcheck do
> > not have to provide extra allocators just for that reason.
> 
> This breaks powerpc builds due to __GFP_NOTRACE not being defined.
> I restarted the test after removing the __GFP_NOTRACE as a testing-only
> hack, and will let you know how it goes.  Also looking into why this
> builds on 32-bit x86 but not on powerpc.

And the reason that it built on 32-bit x86 was that I mistakenly
built only the RCU files, not the whole kernel.  So I am guessing
that there is something I need to merge into tip/smp/hotplug.

On the other hand, removing the __GFP_NOTRACE allows this patchset to
pass modest rcutorture testing on Power.  ;-)

							Thanx, Paul

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