diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-03-16 20:32:14 +0100 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-26 14:33:38 -0300 |
| commit | 800bb1c8dc80bb4121446b56813067f3ea44edee (patch) | |
| tree | 8ed199bf4aac9982b7863d71c0448742769f1a63 /include/linux/migrate.h | |
| parent | f894ddd5ff01d3bb48faf4dc533536bf5269c17a (diff) | |
mm: handle multiple owners of device private pages in migrate_vma
Add a new src_owner field to struct migrate_vma. If the field is set,
only device private pages with page->pgmap->owner equal to that field are
migrated. If the field is not set only "normal" pages are migrated.
Fixes: df6ad69838fc ("mm/device-public-memory: device memory cache coherent with CPU")
Link: https://lore.kernel.org/r/20200316193216.920734-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Bharata B Rao <bharata@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/linux/migrate.h')
| -rw-r--r-- | include/linux/migrate.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 72120061b7d4..3e546cbf03dd 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -196,6 +196,14 @@ struct migrate_vma { unsigned long npages; unsigned long start; unsigned long end; + + /* + * Set to the owner value also stored in page->pgmap->owner for + * migrating out of device private memory. If set only device + * private pages with this owner are migrated. If not set + * device private pages are not migrated at all. + */ + void *src_owner; }; int migrate_vma_setup(struct migrate_vma *args); |