Re: [rfc][patch 2/3] slab: introduce SMP alignment

Nick Piggin
2008-03-03T20:04:17Z

On Mon, Mar 03, 2008 at 11:06:55AM -0800, Christoph Lameter wrote:
> On Mon, 3 Mar 2008, Nick Piggin wrote:
>
> > Introduce SLAB_SMP_ALIGN, for allocations where false sharing must be
> > minimised on SMP systems.
>
> Mandatory alignment are specified as a parameter to kmem_cache_create not
> as flags.

Not after this patch.

> Ycan specify the alignment as a parameter. i.e. L1_CACHE_BYTES
> or cache_line_size().

We don't want either of those, though.

I don't see why this is a problem to do inside slab.