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-yuz...@google.com/
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
