linux-kernel - Re: [PATCH 0/7] userfaultfd: enable zeropage support for shmem

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Message-Id: <221EB91B-4491-4737-BD8B-FE983E1084A4@linux.vnet.ibm.com>
Date:   Fri, 30 Jun 2017 12:20:31 +0300
From:   Mike Rapoprt <rppt@...ux.vnet.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     Andrea Arcangeli <aarcange@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Hillf Danton <hillf.zj@...baba-inc.com>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        linux mm <linux-mm@...ck.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/7] userfaultfd: enable zeropage support for shmem

Hi,

Any updates/comments?


On June 20, 2017 9:20:45 AM GMT+03:00, Mike Rapoport <rppt@...ux.vnet.ibm.com> wrote:
>Hi,
>
>These patches enable support for UFFDIO_ZEROPAGE for shared memory.
>
>The first two patches are not strictly related to userfaultfd, they are
>just minor refactoring to reduce amount of code duplication.
>
>Mike Rapoport (7):
>shmem: shmem_charge: verify max_block is not exceeded before inode
>update
>  shmem: introduce shmem_inode_acct_block
>userfaultfd: shmem: add shmem_mfill_zeropage_pte for userfaultfd
>support
>  userfaultfd: mcopy_atomic: introduce mfill_atomic_pte helper
>  userfaultfd: shmem: wire up shmem_mfill_zeropage_pte
>  userfaultfd: report UFFDIO_ZEROPAGE as available for shmem VMAs
>  userfaultfd: selftest: enable testing of UFFDIO_ZEROPAGE for shmem
>
> fs/userfaultfd.c                         |  10 +-
> include/linux/shmem_fs.h                 |   6 ++
>mm/shmem.c                               | 167
>+++++++++++++++++--------------
> mm/userfaultfd.c                         |  48 ++++++---
> tools/testing/selftests/vm/userfaultfd.c |   2 +-
> 5 files changed, 136 insertions(+), 97 deletions(-)

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