On 7/31/20 12:15 PM, Jason Gunthorpe wrote:
On Tue, Jul 28, 2020 at 03:04:07PM -0700, Ralph Campbell wrote:
On 7/28/20 12:19 PM, Jason Gunthorpe wrote:
On Thu, Jul 23, 2020 at 03:30:04PM -0700, Ralph Campbell wrote:
When migrating the special zero page, migrate_vma_pages() calls
On Tue, Jul 28, 2020 at 03:04:07PM -0700, Ralph Campbell wrote:
>
> On 7/28/20 12:19 PM, Jason Gunthorpe wrote:
> > On Thu, Jul 23, 2020 at 03:30:04PM -0700, Ralph Campbell wrote:
> > > When migrating the special zero page, migrate_vma_pages() calls
> > > mmu_notifier_invalidate_range_start()
On 7/28/20 12:19 PM, Jason Gunthorpe wrote:
On Thu, Jul 23, 2020 at 03:30:04PM -0700, Ralph Campbell wrote:
When migrating the special zero page, migrate_vma_pages() calls
mmu_notifier_invalidate_range_start() before replacing the zero page
PFN in the CPU page tables. This is unnecessary
On Thu, Jul 23, 2020 at 03:30:04PM -0700, Ralph Campbell wrote:
> When migrating the special zero page, migrate_vma_pages() calls
> mmu_notifier_invalidate_range_start() before replacing the zero page
> PFN in the CPU page tables. This is unnecessary since the range was
> invalidated in
When migrating the special zero page, migrate_vma_pages() calls
mmu_notifier_invalidate_range_start() before replacing the zero page
PFN in the CPU page tables. This is unnecessary since the range was
invalidated in migrate_vma_setup() and the page table entry is checked
to be sure it hasn't
