Messages in this thread | | | Date | Thu, 6 Mar 2008 18:20:40 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [rfc][patch 1/3] slub: fix small HWCACHE_ALIGN alignment |
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On Fri, 7 Mar 2008, Nick Piggin wrote:
> > Do you have a case in mind where that would be useful? We had a > > Patch 3/3
Those already have SLAB_HWCACHE_ALIGN.
The point is to switch off alignment for UP? Cant we do that with SLAB_HWCACHE_ALIGN too since SLOB seemed to work successfully without it in the past?
> > Note that there is also KMEM_CACHE which picks up the alignment from > > the compiler. > > Yeah, that's not quite as good either. My allocation flag is dynamic, so > it will not bloat things for no reason on UP machines and SMP kernels. > It also aligns to the detected machine cacheline size rather than a > compile time constant.
Is that really a noteworthy effect?
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