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Subject[PATCH 1/9] mm/rmap: recompute pgoff for huge page
We have to recompute pgoff if the given page is huge, since result based
on HPAGE_SIZE is not approapriate for scanning the vma interval tree, as
shown by commit 36e4f20af833 ("hugetlb: do not use vma_hugecache_offset()
for vma_prio_tree_foreach") and commit 369a713e ("rmap: recompute pgoff
for unmapping huge page").

Signed-off-by: Joonsoo Kim <>

diff --git a/mm/rmap.c b/mm/rmap.c
index 55c8b8d..1214703 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1714,6 +1714,10 @@ static int rmap_walk_file(struct page *page, int (*rmap_one)(struct page *,

if (!mapping)
return ret;
+ if (PageHuge(page))
+ pgoff = page->index << compound_order(page);
vma_interval_tree_foreach(vma, &mapping->i_mmap, pgoff, pgoff) {
unsigned long address = vma_address(page, vma);

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