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    SubjectRe: [PATCH v2 0/3] iommu/io-pgtable-arm-v7s: Use DMA32 zone for page tables
    On Fri, Nov 23, 2018 at 01:23:41PM +0100, Vlastimil Babka wrote:
    > Is this also true for caches created by kmem_cache_create(), that
    > debugging options can result in not respecting the alignment passed to
    > kmem_cache_create()? That would be rather bad, IMHO.

    That's what I understood in the discussion. If not it would make
    our live simpler, but would need to be well document.

    Christoph can probably explain the alignment choices in slub.

    >
    > > But I do agree with the sentiment of not wanting to spread GFP_DMA32
    > > futher into the slab allocator.
    >
    > I don't see a problem with GFP_DMA32 for custom caches. Generic
    > kmalloc() would be worse, since it would have to create a new array of
    > kmalloc caches. But that's already ruled out due to the alignment.

    True, purely slab probably isn't too bad.

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