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Date: Thu, 6 Mar 2008 14:53:11 -0800 (PST) From: Christoph Lameter <clameter@....com> To: Nick Piggin <npiggin@...e.de> cc: Pekka Enberg <penberg@...helsinki.fi>, netdev@...r.kernel.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, yanmin_zhang@...ux.intel.com, David Miller <davem@...emloft.net>, Eric Dumazet <dada1@...mosbay.com> Subject: Re: [rfc][patch 1/3] slub: fix small HWCACHE_ALIGN alignment On Thu, 6 Mar 2008, Nick Piggin wrote: > > That was due to SLUB's support for smaller allocation sizes. AFAICT has > > nothing to do with alignment. > > The smaller sizes meant objects were less often aligned on cacheline > boundaries. Right since SLAB_HWCACHE_ALIGN does not align for very small objects. > We could, but I'd rather just use the flag. Do you have a case in mind where that would be useful? We had a SLAB_HWCACHE_MUST_ALIGN or so at some point but it was rarely to never used. Note that there is also KMEM_CACHE which picks up the alignment from the compiler. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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