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mm/debug: print hashed address of struct page

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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.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: William Kucharski <william.kucharski@oracle.com>
Link: http://lkml.kernel.org/r/20200709202117.7216-7-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2020-08-06 23:19:48 -07:00 • committed by Linus Torvalds
parent 9bdaf2cc5e
commit 54a75157d9
1 changed files with 4 additions and 4 deletions
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8
mm/debug.c
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@ -95,17 +95,17 @@ void __dump_page(struct page *page, const char *reason)
*/
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));
}