Messages in this thread | | | Date | Thu, 4 Dec 2014 15:45:34 -0500 | From | Tejun Heo <> | Subject | Re: [RFC v2] percpu: Add a separate function to merge free areas |
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Hello, Christoph.
On Thu, Dec 04, 2014 at 02:28:10PM -0600, Christoph Lameter wrote: > Well this is not a common use case and that is not what the per cpu > allocator was designed for. There is bound to be signifcant fragmentation > with the current design. The design was for rare allocations when > structures are initialized.
My unverified gut feeling is that fragmentation prolly is a lot less of a problem for percpu allocator given that most percpu allocations are fairly small. On the other hand, we do wanna pack them tight as percpu memory is really expensive space-wise. I could be wrong tho.
Thanks.
-- tejun
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