The patch titled
Subject: mm/swap.c: fix release_pages() when releasing devmap pages
has been added to the -mm tree. Its filename is
mm-swap-fix-release_pages-when-releasing-devmap-pages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-swap-fix-release_pages-when-releasing-devmap-pages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-swap-fix-release_pages-when-releasing-devmap-pages.patch
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------------------------------------------------------
From: Ira Weiny <ira.weiny@xxxxxxxxx>
Subject: mm/swap.c: fix release_pages() when releasing devmap pages
Device pages can be more than type MEMORY_DEVICE_PUBLIC.
Handle all device pages within release_pages()
This was found via code inspection while determining if release_pages()
and the new put_user_pages() could be interchangeable.
Link: http://lkml.kernel.org/r/20190523223746.4982-1-ira.weiny@xxxxxxxxx
Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Jérôme Glisse <jglisse@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/mm/swap.c~mm-swap-fix-release_pages-when-releasing-devmap-pages
+++ a/mm/swap.c
@@ -740,15 +740,14 @@ void release_pages(struct page **pages,
if (is_huge_zero_page(page))
continue;
- /* Device public page can not be huge page */
- if (is_device_public_page(page)) {
+ if (is_zone_device_page(page)) {
if (locked_pgdat) {
spin_unlock_irqrestore(&locked_pgdat->lru_lock,
flags);
locked_pgdat = NULL;
}
- put_devmap_managed_page(page);
- continue;
+ if (put_devmap_managed_page(page))
+ continue;
}
page = compound_head(page);
_
Patches currently in -mm which might be from ira.weiny@xxxxxxxxx are
mm-swap-fix-release_pages-when-releasing-devmap-pages.patch
