On 5/27/23 01:44, Yu Zhao wrote:
TLDR ==== This patchset adds a fast path to clear the accessed bit without taking kvm->mmu_lock. It can significantly improve the performance of guests when the host is under heavy memory pressure. ChromeOS has been using a similar approach [1] since mid 2021 and it was proven successful on tens of millions devices. This v2 addressed previous requests [2] on refactoring code, removing inaccurate/redundant texts, etc. [1]https://crrev.com/c/2987928 [2]https://lore.kernel.org/r/20230217041230.2417228-1-yuzhao@xxxxxxxxxx/
From the KVM point of view the patches look good (though I wouldn't mind if Nicholas took a look at the ppc part). Jason's comment on the MMU notifier side are promising as well. Can you send v3 with Oliver's comments addressed?
Thanks, Paolo
