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We can increase the efficiency of rx path by using buffers to receive packets then build SKBs around them just before passing into the network stack. In contrast, preallocating SKBs too early reduces CPU cache efficiency. Performance is slightly increased but the changes allow more potential optimizations. Signed-off-by: Sieng Piaw Liew <liew.s.piaw@gmail.com> [improve code format] Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>