diff options
| author | Nicolin Chen <nicolinc@nvidia.com> | 2022-07-22 19:02:50 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2022-07-23 07:29:11 -0600 |
| commit | cfedb3d5e602dbf12e254cf88aceac348342f9b2 (patch) | |
| tree | 22f39127b32411c5a2ae13a83596fdd3cdfff358 /Documentation/driver-api | |
| parent | 10e19d492a326afe7f016a8735ccdfd7c65fc979 (diff) | |
vfio/ccw: Only pass in contiguous pages
This driver is the only caller of vfio_pin/unpin_pages that might pass
in a non-contiguous PFN list, but in many cases it has a contiguous PFN
list to process. So letting VFIO API handle a non-contiguous PFN list
is actually counterproductive.
Add a pair of simple loops to pass in contiguous PFNs only, to have an
efficient implementation in VFIO.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Tested-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Link: https://lore.kernel.org/r/20220723020256.30081-5-nicolinc@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'Documentation/driver-api')
0 files changed, 0 insertions, 0 deletions