diff options
Diffstat (limited to 'mm/page_owner.c')
| -rw-r--r-- | mm/page_owner.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index 5df0d6892bdce6..b4476f45b376e1 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -366,9 +366,12 @@ void __split_page_owner(struct page *page, int old_order, int new_order) void __folio_copy_owner(struct folio *newfolio, struct folio *old) { + int i; struct page_ext *old_ext; struct page_ext *new_ext; struct page_owner *old_page_owner; + struct page_owner *new_page_owner; + depot_stack_handle_t migrate_handle; old_ext = page_ext_get(&old->page); if (unlikely(!old_ext)) @@ -381,6 +384,8 @@ void __folio_copy_owner(struct folio *newfolio, struct folio *old) } old_page_owner = get_page_owner(old_ext); + new_page_owner = get_page_owner(new_ext); + migrate_handle = new_page_owner->handle; __update_page_owner_handle(new_ext, old_page_owner->handle, old_page_owner->order, old_page_owner->gfp_mask, old_page_owner->last_migrate_reason, @@ -395,6 +400,16 @@ void __folio_copy_owner(struct folio *newfolio, struct folio *old) old_page_owner->free_pid, old_page_owner->free_tgid, old_page_owner->free_ts_nsec); + /* + * We linked the original stack to the new folio, we need to do the same + * for the new one and the old folio otherwise there will be an imbalance + * when subtracting those pages from the stack. + */ + for (i = 0; i < (1 << new_page_owner->order); i++) { + old_page_owner->handle = migrate_handle; + old_ext = page_ext_next(old_ext); + old_page_owner = get_page_owner(old_ext); + } page_ext_put(new_ext); page_ext_put(old_ext); |