Messages in this thread | | | Subject | Re: block: DMA alignment of IO buffer allocated from slab | From | Andrey Ryabinin <> | Date | Mon, 24 Sep 2018 19:07:18 +0300 |
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On 09/24/2018 06:58 PM, Bart Van Assche wrote: > On Mon, 2018-09-24 at 18:52 +0300, Andrey Ryabinin wrote: >> Yes, with CONFIG_DEBUG_SLAB=y, CONFIG_SLUB_DEBUG_ON=y kmalloc() guarantees >> that result is aligned on ARCH_KMALLOC_MINALIGN boundary. > > Had you noticed that Vitaly Kuznetsov showed that this is not the case? See > also https://lore.kernel.org/lkml/87h8ij0zot.fsf@vitty.brq.redhat.com/. >
I'm not following. On x86-64 ARCH_KMALLOC_MINALIGN is 8, all pointers that Vitaly Kuznetsov showed are 8-byte aligned.
> Thanks, > > Bart. >
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