The patch titled
Subject: mm/huge_memory.c: use head to check huge zero page
has been added to the -mm tree. Its filename is
mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Subject: mm/huge_memory.c: use head to check huge zero page
The page could be a tail page, if this is the case, this BUG_ON will never
be triggered.
Link: http://lkml.kernel.org/r/20200110032610.26499-1-richardw.yang@xxxxxxxxxxxxxxx
Fixes: e9b61f19858a ("thp: reintroduce split_huge_page()")
Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/huge_memory.c~mm-huge_memoryc-use-head-to-check-huge-zero-page
+++ a/mm/huge_memory.c
@@ -2712,7 +2712,7 @@ int split_huge_page_to_list(struct page
unsigned long flags;
pgoff_t end;
- VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
+ VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON_PAGE(!PageCompound(page), page);
_
Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are
mm-thp-grab-the-lock-before-manipulation-defer-list.patch
mm-huge_memoryc-use-head-to-check-huge-zero-page.patch
mm-huge_memoryc-use-head-to-emphasize-the-purpose-of-page.patch
mm-remove-dead-code-totalram_pages_set.patch
