Re: [PATCH v2 2/2] mm, sl[aou]b: guarantee natural alignment for kmalloc(power-of-two)

Christoph Hellwig
2019-09-30T08:06:26Z

On Mon, Sep 23, 2019 at 06:36:32PM +0200, Vlastimil Babka wrote:
> So if anyone thinks this is a good idea, please express it (preferably
> in a formal way such as Acked-by), otherwise it seems the patch will be
> dropped (due to a private NACK, apparently).

I think we absolutely need something like this, and I'm sick and tired
of the people just claiming there is no problem.

From the user POV I don't care if aligned allocations need a new
GFP_ALIGNED flag or not, but as far as I can tell the latter will
probably cause more overhead in practice than not having it.

So unless someone comes up with a better counter proposal to provide
aligned kmalloc of some form that doesn't require a giant amount of
boilerplate code in the users:

Acked^2-by: Christoph Hellwig <hch@lst.de>