On 7/28/20 12:15 PM, Jason Gunthorpe wrote:
On Thu, Jul 23, 2020 at 03:30:01PM -0700, Ralph Campbell wrote:
static inline int mm_has_notifiers(struct mm_struct *mm)
@@ -513,6 +519,7 @@ static inline void mmu_notifier_range_init(struct
mmu_notifier_range *range,
range->start =
On Thu, Jul 23, 2020 at 03:30:01PM -0700, Ralph Campbell wrote:
> static inline int mm_has_notifiers(struct mm_struct *mm)
> @@ -513,6 +519,7 @@ static inline void mmu_notifier_range_init(struct
> mmu_notifier_range *range,
> range->start = start;
> range->end = end;
>
Currently migrate_vma_setup() calls mmu_notifier_invalidate_range_start()
which flushes all device private page mappings whether or not a page
is being migrated to/from device private memory. In order to not disrupt
device mappings that are not being migrated, shift the responsibility
for clearing
