Re: [PATCH v13 00/85] KVM: Stop grabbing references to PFNMAP'd pages

Paolo Bonzini
2024-10-17T17:40:20Z

On Thu, Oct 10, 2024 at 8:24 PM Sean Christopherson <seanjc@google.com> wrote:
> v13:
> - Rebased onto v6.12-rc2
> - Collect reviews. [Alex and others]
> - Fix a transient bug in arm64 and RISC-V where KVM would leak a page
> refcount. [Oliver]
> - Fix a dangling comment. [Alex]
> - Drop kvm_lookup_pfn(), as the x86 that "needed" it was stupid and is (was?)
> eliminated in v6.12.
> - Drop check_user_page_hwpoison(). [Paolo]
> - Drop the arm64 MTE fixes that went into 6.12.
> - Slightly redo the guest_memfd interaction to account for 6.12 changes.

Here is my own summary of the changes:

patches removed from v12:
01/02 - already upstream
09 - moved to separate A/D series [1]
34 - not needed due to new patch 36
35 - gone after 620525739521376a65a690df899e1596d56791f8

patches added or substantially changed in v13:
05/06/07 - new, suggested by Yan Zhao
08 - code was folded from mmu_spte_age into kvm_rmap_age_gfn_range
14 - new, suggested by me in reply to 84/84 (yuck)
15 - new, suggested by me in reply to 84/84
19 - somewhat rewritten for new follow_pfnmap API
27 - smaller changes due to new follow_pfnmap API
36 - rewritten, suggested by me
45 - new, cleanup
46 - much simplified due to new patch 45

Looks good to me, thanks and congratulations!! Should we merge it in
kvm/next asap?

Paolo

[1] https://patchew.org/linux/20241011021051.1557902-1-seanjc@google.com/20241011021051.1557902-5-seanjc@google.com/