Messages in this thread | | | From | Linus Torvalds <> | Date | Sat, 30 Jul 2011 08:27:47 -1000 | Subject | Re: [GIT PULL] Lockless SLUB slowpaths for v3.1-rc1 |
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On Thu, Jul 28, 2011 at 12:47 PM, Pekka Enberg <penberg@kernel.org> wrote: > > This pull request has patches to make SLUB slowpaths lockless like we > already did for the fastpaths. They have been sitting in linux-next for a > while now and should be fine. David Rientjes reports improved performance:
So I'm not excited about the growth of the data structure, but I'll pull this. The performance numbers seem to be solid, and dang it, it is wonderful to finally hear about netperf performance *improvements* due to slab changes, rather than things getting slower.
And 'struct page' is largely random-access, so the fact that the growth makes it basically one cacheline in size sounds like a good thing.
Do we allocate the page map array sufficiently aligned that we actually don't ever have the case of straddling a cacheline? I didn't check.
Linus
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