Hello, Eric. Thank you very much for a kind comment about my question. I have one more question related to network subsystem. Please let me know what I misunderstand. 2012/10/14 Eric Dumazet <eric.dumazet@xxxxxxxxx>: > In latest kernels, skb->head no longer use kmalloc()/kfree(), so SLAB vs > SLUB is less a concern for network loads. > > In 3.7, (commit 69b08f62e17) we use fragments of order-3 pages to > populate skb->head. You mentioned that in latest kernel skb->head no longer use kmalloc()/kfree(). But, why result of David's "netperf RR" test on v3.6 is differentiated by choosing the allocator? As far as I know, __netdev_alloc_frag may be introduced in v3.5, so I'm just confused. Does this test use __netdev_alloc_skb with "__GFP_WAIT | GFP_DMA"? Does normal workload for network use __netdev_alloc_skb with "__GFP_WAIT | GFP_DMA"? Thanks! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>