Re: [PATCH v2] X86-32: Allocate 256 bytes for pgd in PAE paging

[Dave Hansen]

On 12/18/2014 06:52 AM, Christoph Lameter wrote:
> On Wed, 17 Dec 2014, Dave Hansen wrote:
>> > IOW, do *ALL* of the sl*b allocators in all of their forms with all of
>> > their debugging options guarantee 32-byte alignment when allocating
>> > 256-byte objects?
> No. For that the arch has to set a macro call ARCH_KMALLOC_MINALIGN or
> ARCH_DMA_MINALIGN. Default alignment is to a word boundary.

OK, sounds like this is going to need its own slab.  It will make the
patch a bit bigger but shouldn't be all that much more complicated.

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