On Wed, Sep 03, 2025 at 11:18:51AM +1000, Balbir Singh wrote:
[...]
>@@ -836,15 +1107,47 @@ static void __migrate_device_pages(unsigned long
>*src_pfns,
> migrate->pgmap_owner);
> mmu_notifier_invalidate_range_start(&range);
> }
>- migrate_vma_insert_page(migrate, addr, newpage,
>+
>+ if ((src_pfns[i] & MIGRATE_PFN_COMPOUND) &&
>+ (!(dst_pfns[i] & MIGRATE_PFN_COMPOUND))) {
>+ nr = HPAGE_PMD_NR;
This one trigger BUILD_BUG() if !PGTABLE_HAS_HUGE_LEAVES.
>+ src_pfns[i] &= ~MIGRATE_PFN_COMPOUND;
>+ src_pfns[i] &= ~MIGRATE_PFN_MIGRATE;
>+ goto next;
>+ }
>+
>+ migrate_vma_insert_page(migrate, addr, &dst_pfns[i],
> &src_pfns[i]);
>- continue;
>+ goto next;
--
Wei Yang
Help you, Help me
