Messages in this thread | | | Date | Wed, 12 Apr 2023 08:31:42 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH net-next v6 04/18] mm: Make the page_frag_cache allocator use per-cpu |
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On Tue, Apr 11, 2023 at 05:08:48PM +0100, David Howells wrote: > Make the page_frag_cache allocator have a separate allocation bucket for > each cpu to avoid racing. This means that no lock is required, other than > preempt disablement, to allocate from it, though if a softirq wants to > access it, then softirq disablement will need to be added.
Can you show any performance numbers?
> Make the NVMe, mediatek and GVE drivers pass in NULL to page_frag_cache() > and use the default allocation buckets rather than defining their own.
Let me ask a third time as I've not got an answer the last two times: why are these callers treated different from the others?
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