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

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Message-Id: <20181114215155.259978-1-brho@google.com>
Date:   Wed, 14 Nov 2018 16:51:52 -0500
From:   Barret Rhoden <brho@...gle.com>
To:     Dan Williams <dan.j.williams@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ross Zwisler <zwisler@...nel.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "Radim Krčmář" <rkrcmar@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>
Cc:     linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        kvm@...r.kernel.org, yu.c.zhang@...el.com, yi.z.zhang@...el.com
Subject: [PATCH v2 0/3] kvm: Use huge pages for DAX-backed files

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@google.com/

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


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