Re: [PATCH v4 0/2] kvm: Use huge pages for DAX-backed files

Paolo Bonzini
2019-12-12T00:22:29Z

On 11/12/19 22:32, Barret Rhoden wrote:
> This patchset allows KVM to map huge pages for DAX-backed files.
>
> I held previous versions in limbo while people were sorting out whether
> or not DAX pages were going to remain PageReserved and how that relates
> to KVM.
>
> Now that that is sorted out (DAX pages are PageReserved, but they are
> not kvm_is_reserved_pfn(), and DAX pages are considered on a
> case-by-case basis for KVM), I can repost this.
>
> v3 -> v4:
> v3: https://lore.kernel.org/lkml/20190404202345.133553-1-brho@google.com/
> - Rebased onto linus/master
>
> v2 -> v3:
> v2: https://lore.kernel.org/lkml/20181114215155.259978-1-brho@google.com/
> - Updated Acks/Reviewed-by
> - Rebased onto linux-next
>
> v1 -> v2:
> https://lore.kernel.org/lkml/20181109203921.178363-1-brho@google.com/
> - Updated Acks/Reviewed-by
> - Minor touchups
> - Added patch to remove redundant PageReserved() check
> - Rebased onto linux-next
>
> RFC/discussion thread:
> https://lore.kernel.org/lkml/20181029210716.212159-1-brho@google.com/
>
> Barret Rhoden (2):
> mm: make dev_pagemap_mapping_shift() externally visible
> kvm: Use huge pages for DAX-backed files
>
> arch/x86/kvm/mmu/mmu.c | 36 ++++++++++++++++++++++++++++++++----
> include/linux/mm.h | 3 +++
> mm/memory-failure.c | 38 +++-----------------------------------
> mm/util.c | 34 ++++++++++++++++++++++++++++++++++
> 4 files changed, 72 insertions(+), 39 deletions(-)
>

Thanks, with the Acked-by already in place for patch 1 I can pick this up.

Paolo