Re: [rfc][patch 3/3] use SLAB_ALIGN_SMP

Christoph Lameter
2008-03-03T19:11:05Z

On Mon, 3 Mar 2008, Eric Dumazet wrote:

> This reminds me a previous attempt of removing SLAB_HWCACHE_ALIGN
>
> http://kernel.org/pub/linux/kernel/people/christoph/patch-archive/2007/2.6.21-rc6/remove_hwcache_align
>
> At that time Christoph didnt took into account the CONFIG_SMP thing (false
> sharing avoidance), but also that L1_CACHE_SIZE is a compile constant, that
> can differs with cache_line_size()

If cache_line_size() is universally available then we can specify it as
the alignment parameter to kmem_cache_create(). That would allow removal
of SLAB_HWCACHE_ALIGN.