Messages in this thread |  | | Date | Fri, 24 Oct 2014 09:41:49 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [RFC 0/4] [RFC] slub: Fastpath optimization (especially for RT) |
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> I found that you said retrieving tid first is sufficient to do > things right in old discussion. :)
Right but the tid can be obtained from a different processor.
One other aspect of this patchset is that it reduces the cache footprint of the alloc and free functions. This typically results in a performance increase for the allocator. If we can avoid the page_address() and virt_to_head_page() stuff that is required because we drop the ->page field in a sufficient number of places then this may be a benefit that goes beyond the RT and CONFIG_PREEMPT case.
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