Messages in this thread | | | Date | Wed, 4 Dec 2013 16:33:43 +0000 | From | Christoph Lameter <> | Subject | Re: [patch 2/2] fs: buffer: move allocation failure loop into the allocator |
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On Thu, 5 Dec 2013, Joonsoo Kim wrote:
> Now we have cpu partial slabs facility, so I think that slowpath isn't really > slow. And it doesn't much increase the management overhead in the node > partial lists, because of cpu partial slabs.
Well yes that may address some of the issues here.
> And larger frame may cause more slab_lock contention or cmpxchg contention > if there are parallel freeings. > > But, I don't know which one is better. Is larger frame still better? :)
Could you run some tests to figure this one out? There are also some situations in which we disable the per cpu partial pages though. F.e. for low latency/realtime. I posted in kernel synthetic benchmarks for slab a while back. That maybe something to start with.
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