[PATCH v4 01/12] mm/khugepaged: deposit a newly allocated page table on collapse

[Andrew Morton]

On Wed, 23 Sep 2026 08:14:01 +0100 "Lorenzo Stoakes (ARM)" <ljs at kernel.org> wrote:

> Andrew - would it be possible to make one quick fix up below?
> 
> Fixup is here:
> 
> -		if (!pgtable)
> -			goto out_nolock;
> +		if (!pgtable) {
> +			result = SCAN_ALLOC_HUGE_PAGE_FAIL;
> +			goto out_nolock;
> +		}

--- a/mm/khugepaged.c~mm-khugepaged-deposit-a-newly-allocated-page-table-on-collapse-fix
+++ a/mm/khugepaged.c
@@ -1329,8 +1329,10 @@ static enum scan_result collapse_huge_pa
 
 	if (is_pmd_order(order)) {
 		pgtable = alloc_deposit_pte(mm);
-		if (!pgtable)
+		if (!pgtable) {
+			result = SCAN_ALLOC_HUGE_PAGE_FAIL;
 			goto out_nolock;
+		}
 	}
 
 	mmap_read_lock(mm);
_