From: kpusukur <kishore.kumar.pusukuri@xxxxxxxxxx> Date: Sun, 17 Jul 2016 12:35:20 -0700 > We would welcome feedback and discussion of potential problems. > > We would also like to hear ideas for other areas in the kernel where a > similar technique could be employed. For example, we've also applied > this idea to copy on write operations for huge pages and it achieves > around 20x speedup. I don't know about this. You can only profitably do this when you have enough physical cpu resources schedulable, and on the same NUMA node. By the time you compute the complete answer to that entire condition you could have completed the hugepage clear. Also, you should experiment with simply using a dedicated hugepage clear assembler loop for these chips. It's really stupid to pay the transaction cost of going in and out of the clear_user_highpage() function N times per huge page. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
