Re: [PATCH mm-unstable v2 00/10] mm/kvm: locklessly clear the accessed bit

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux