The patch titled
Subject: mm/debug: print hashed address of struct page
has been added to the -mm tree. Its filename is
mm-print-hashed-address-of-struct-page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-print-hashed-address-of-struct-page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-print-hashed-address-of-struct-page.patch
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm/debug: print hashed address of struct page
The actual address of the struct page isn't particularly helpful, while
the hashed address helps match with other messages elsewhere. Add the PFN
that the page refers to in order to help diagnose problems where the page
is improperly aligned for the purpose.
Link: http://lkml.kernel.org/r/20200709202117.7216-7-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: William Kucharski <william.kucharski@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/debug.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/mm/debug.c~mm-print-hashed-address-of-struct-page
+++ a/mm/debug.c
@@ -89,17 +89,17 @@ void __dump_page(struct page *page, cons
*/
mapcount = PageSlab(head) ? 0 : page_mapcount(page);
- pr_warn("page:%px refcount:%d mapcount:%d mapping:%p index:%#lx\n",
+ pr_warn("page:%p refcount:%d mapcount:%d mapping:%p index:%#lx pfn:%#lx\n",
page, page_ref_count(head), mapcount, mapping,
- page_to_pgoff(page));
+ page_to_pgoff(page), page_to_pfn(page));
if (compound) {
if (hpage_pincount_available(page)) {
- pr_warn("head:%px order:%u compound_mapcount:%d compound_pincount:%d\n",
+ pr_warn("head:%p order:%u compound_mapcount:%d compound_pincount:%d\n",
head, compound_order(head),
compound_mapcount(head),
compound_pincount(head));
} else {
- pr_warn("head:%px order:%u compound_mapcount:%d\n",
+ pr_warn("head:%p order:%u compound_mapcount:%d\n",
head, compound_order(head),
compound_mapcount(head));
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-handle-page-mapping-better-in-dump_page.patch
mm-dump-compound-page-information-on-a-second-line.patch
mm-print-head-flags-in-dump_page.patch
mm-switch-dump_page-to-get_kernel_nofault.patch
mm-print-the-inode-number-in-dump_page.patch
mm-print-hashed-address-of-struct-page.patch
vmalloc-convert-to-xarray.patch
mm-store-compound_nr-as-well-as-compound_order.patch
mm-move-page-flags-include-to-top-of-file.patch
mm-add-thp_order.patch
mm-add-thp_size.patch
mm-replace-hpage_nr_pages-with-thp_nr_pages.patch
mm-add-thp_head.patch
mm-introduce-offset_in_thp.patch
