Re: [PATCH v2 0/3] kvm: Use huge pages for DAX-backed files

[Dan Williams]

[ add Alex who is looking into removing PageReserved for DAX pages. ]
On Wed, Nov 14, 2018 at 1:53 PM Barret Rhoden <brho@xxxxxxxxxx> wrote:
>
> This patch series depends on dax pages not being PageReserved.  Once
> that is in place, these changes will let KVM use huge pages with
> dax-backed files.  Without the PageReserved change, KVM and DAX still
> work with these patches, simply without huge pages - which is the
> current situation.
>
> RFC/discussion thread:
> https://lore.kernel.org/lkml/20181029210716.212159-1-brho@xxxxxxxxxx/
>
> v1 -> v2:
> https://lore.kernel.org/lkml/20181109203921.178363-1-brho@xxxxxxxxxx/
>
> - Updated Acks/Reviewed-by
> - Minor touchups
> - Added patch to remove redundant PageReserved() check
> - Rebased onto linux-next
>
>
> Barret Rhoden (3):
>   mm: make dev_pagemap_mapping_shift() externally visible
>   kvm: Use huge pages for DAX-backed files
>   kvm: remove redundant PageReserved() check
>
>  arch/x86/kvm/mmu.c  | 33 +++++++++++++++++++++++++++++++--
>  include/linux/mm.h  |  3 +++
>  mm/memory-failure.c | 38 +++-----------------------------------
>  mm/util.c           | 34 ++++++++++++++++++++++++++++++++++
>  virt/kvm/kvm_main.c |  8 ++------
>  5 files changed, 73 insertions(+), 43 deletions(-)
>
> --
> 2.19.1.1215.g8438c0b245-goog
>