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

[Matthew Wilcox]

On Mon, Sep 24, 2018 at 09:10:43PM -0700, Bart Van Assche wrote:
> On 9/24/18 8:28 PM, Matthew Wilcox wrote:
> > [ ... ] Because if we have to
> > round all allocations below 64 bytes up to 64 bytes, [ ... ]
> Have you noticed that in another e-mail in this thread it has been explained
> why it is not necessary on x86 to align buffers allocated by kmalloc() on a
> 64-byte boundary even if these buffers are used for DMA?

Oh, so drivers which do this only break on !x86.  Yes, that'll work
out great.