linux-kernel - [RFC PATCH 0/2] mm/gup: introduce vaddr_pin_pages_remote(), FOLL

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Date:   Sun, 11 Aug 2019 18:50:42 -0700
From:   john.hubbard@...il.com
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jérôme Glisse <jglisse@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-rdma@...r.kernel.org,
        John Hubbard <jhubbard@...dia.com>
Subject: [RFC PATCH 0/2] mm/gup: introduce vaddr_pin_pages_remote(), FOLL_PIN

From: John Hubbard <jhubbard@...dia.com>

Hi,

Dave Chinner's head didn't seem to explode...much, when he saw Ira's
series, so I optimistically started taking it from there...this builds on
top of Ira's patchset that he just sent out:

  "[RFC PATCH v2 00/19] RDMA/FS DAX truncate proposal V1,000,002   ;-)" [1]

...which in turn is based on the latest -mmotm.

If Ira's series and this one are both acceptable, then

    a) I'll rework the 41-patch "put_user_pages(): miscellaneous call
       sites" series, and

    b) note that this will take rather longer and will be quite a bit more
       intrusive for each call site (but it's worth it), due to the
       need to plumb the owning struct file* all the way down to the gup()
       call. whew.

[1] https://lore.kernel.org/r/20190809225833.6657-1-ira.weiny@intel.com

[2] https://lore.kernel.org/r/20190807013340.9706-1-jhubbard@nvidia.com

John Hubbard (2):
  mm/gup: introduce FOLL_PIN flag for get_user_pages()
  mm/gup: introduce vaddr_pin_pages_remote()

 drivers/infiniband/core/umem_odp.c | 15 ++++----
 include/linux/mm.h                 |  8 +++++
 mm/gup.c                           | 55 +++++++++++++++++++++++++++++-
 3 files changed, 71 insertions(+), 7 deletions(-)

-- 
2.22.0