Re: [PATCH] add __GFP_ZERO to GFP_LEVEL_MASK

[Andrew Morton <akpm@linux-foundation.org>]

On Tue, 24 Jul 2007 16:00:32 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:

> On Tue, 24 Jul 2007, Andrew Morton wrote:
> 
> > I think I'll duck this for now.  Otherwise I have a suspicion that I'll
> > be the first person to run it and I'm too old for such excitement.
> 
> I always had the suspicion that you have some magical script 
> which will immediately tell you that a patch is not working ;-)

sort of a defensive crouch.

> Works fine on x86_64 (on top of the ctor cleanup patchset) and passes the 
> kernel build test but then there may be creatively designed drivers and 
> such that pass these flags to the slab allocators which will now BUG.

__GFP_COLD looks OK.

__GFP_COMP I'm not so sure about. 
drivers/char/drm/drm_pci.c:drm_pci_alloc() (and other places like infiniband)
pass it into dma_alloc_coherent() which some architectures implement via slab.  umm,
arch/arm/mm/consistent.c is one such.

__GFP_MOVABLE looks OK.

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