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| author | John Hubbard <jhubbard@nvidia.com> | 2020-07-27 13:43:38 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-07-27 13:43:38 -0600 |
| commit | 9d532f286914add61e02312881733a90355f153c (patch) | |
| tree | 7d077623eb2f6ddd653b05a494caa3a84af876b3 /drivers/vfio/pci | |
| parent | e1907d6752a26ccfcda1573b5a7542b056553046 (diff) | |
| download | linux-9d532f286914add61e02312881733a90355f153c.tar.bz2 | |
vfio/spapr_tce: convert get_user_pages() --> pin_user_pages()
This code was using get_user_pages*(), in a "Case 2" scenario
(DMA/RDMA), using the categorization from [1]. That means that it's
time to convert the get_user_pages*() + put_page() calls to
pin_user_pages*() + unpin_user_pages() calls.
There is some helpful background in [2]: basically, this is a small
part of fixing a long-standing disconnect between pinning pages, and
file systems' use of those pages.
[1] Documentation/core-api/pin_user_pages.rst
[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: kvm@vger.kernel.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio/pci')
0 files changed, 0 insertions, 0 deletions