The patch titled
Subject: hugetlb: do not use vma_hugecache_offset() for vma_prio_tree_foreach
has been added to the -mm tree. Its filename is
hugetlb-do-not-use-vma_hugecache_offset-for-vma_prio_tree_foreach.patch
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From: Michal Hocko <mhocko@xxxxxxx>
Subject: hugetlb: do not use vma_hugecache_offset() for vma_prio_tree_foreach
0c176d5 ("mm: hugetlb: fix pgoff computation when unmapping page from
vma") fixed pgoff calculation but it has replaced it by
vma_hugecache_offset() which is not approapriate for offsets used for
vma_prio_tree_foreach() because that one expects index in page units
rather than in huge_page_shift.
Using vma_hugecache_offset() is not incorrect because the pgoff will fit
into the same vmas but it is confusing so the standard PAGE_SHIFT based
index calculation is used instead.
Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
Acked-by: Hillf Danton <dhillf@xxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN mm/hugetlb.c~hugetlb-do-not-use-vma_hugecache_offset-for-vma_prio_tree_foreach mm/hugetlb.c
--- a/mm/hugetlb.c~hugetlb-do-not-use-vma_hugecache_offset-for-vma_prio_tree_foreach
+++ a/mm/hugetlb.c
@@ -2480,7 +2480,8 @@ static int unmap_ref_private(struct mm_s
* from page cache lookup which is in HPAGE_SIZE units.
*/
address = address & huge_page_mask(h);
- pgoff = vma_hugecache_offset(h, vma, address);
+ pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) +
+ vma->vm_pgoff;
mapping = vma->vm_file->f_dentry->d_inode->i_mapping;
/*
_
Patches currently in -mm which might be from mhocko@xxxxxxx are
origin.patch
linux-next.patch
mm-hugetlb-add-arch-hook-for-clearing-page-flags-before-entering-pool.patch
mm-memblock-reduce-overhead-in-binary-search.patch
mm-memblock-use-existing-interface-to-set-nid.patch
mm-memblock-cleanup-early_node_map-related-comments.patch
mm-thp-fix-the-pmd_clear-arguments-in-pmdp_get_and_clear.patch
mm-thp-fix-the-update_mmu_cache-last-argument-passing-in-mm-huge_memoryc.patch
memcg-trivial-fixes-for-documentation-cgroups-memorytxt.patch
memcg-cleanup-kmem-tcp-ifdefs.patch
memcg-move-mem_cgroup_is_root-upwards.patch
hugetlb-do-not-use-vma_hugecache_offset-for-vma_prio_tree_foreach.patch
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