On 09/03/2018 10:07 PM, Aneesh Kumar K.V wrote:
This patch series add support for migrating compound pages if we find them in
the
CMA area before taking long term page reference for VFIO.
We now call lru_add_drain_all instead of lru_add_drain() which means we
now have higher chances of isolate_lru_page succeeding. The patch also
migrate all the pages in one call, instead of one page at a time.
Testing:
* TODO: test with hugetlb backed guest ram.
* Testing done with a code change as below
- if (is_migrate_cma_page(pages[i]) && migrate_allow) {
+ if (migrate_allow) {
...
+ migrate_allow = false;
Aneesh Kumar K.V (3):
mm: Export alloc_migrate_huge_page
powerpc/mm/iommu: Allow large IOMMU page size only for hugetlb backing
powerpc/mm/iommu: Allow migration of cma allocated pages during
mm_iommu_get
arch/powerpc/mm/mmu_context_iommu.c | 209 +++++++++++++++++-----------
include/linux/hugetlb.h | 2 +
mm/hugetlb.c | 4 +-
3 files changed, 128 insertions(+), 87 deletions(-)
