Re: block: DMA alignment of IO buffer allocated from slab

From: Bart Van Assche
Date: Mon Sep 24 2018 - 11:58:46 EST

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On Mon, 2018-09-24 at 18:52 +-0300, Andrey Ryabinin wrote:
+AD4 Yes, with CONFIG+AF8-DEBUG+AF8-SLAB+AD0-y, CONFIG+AF8-SLUB+AF8-DEBUG+AF8-ON+AD0-y kmalloc() guarantees
+AD4 that result is aligned on ARCH+AF8-KMALLOC+AF8-MINALIGN boundary.

Had you noticed that Vitaly Kuznetsov showed that this is not the case? See
also https://lore.kernel.org/lkml/87h8ij0zot.fsf+AEA-vitty.brq.redhat.com/.

Thanks,

Bart.

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