Displaying 2 results from an estimated 2 matches for "df6ad69838fc".
2020 Mar 16
0
[PATCH 2/4] 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.
Signed-off-by: Christoph Hellwig <hch at lst.de>
Fixes: df6ad69838fc ("mm/device-public-memory: device memory cache coherent with CPU")
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 1 +
drivers/gpu/drm/nouveau/nouveau_dmem.c | 1 +
include/linux/migrate.h | 8 ++++++++
mm/migrate.c | 9 ++++++---
4 files changed, 1...
2020 Mar 16
14
ensure device private pages have an owner v2
When acting on device private mappings a driver needs to know if the
device (or other entity in case of kvmppc) actually owns this private
mapping. This series adds an owner field and converts the migrate_vma
code over to check it. I looked into doing the same for
hmm_range_fault, but as far as I can tell that code has never been
wired up to actually work for device private memory, so instead of