The patch titled
Subject: mm: cma: WARN if freed memory is still in use
has been removed from the -mm tree. Its filename was
mm-cma-warn-if-freed-memory-is-still-in-use.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Subject: mm: cma: WARN if freed memory is still in use
Memory returned to free_contig_range() must have no other references. Let
kernel to complain loudly if page reference count is not equal to 1.
[rientjes@xxxxxxxxxx: support sparsemem]
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Reviewed-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Acked-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff -puN mm/page_alloc.c~mm-cma-warn-if-freed-memory-is-still-in-use mm/page_alloc.c
--- a/mm/page_alloc.c~mm-cma-warn-if-freed-memory-is-still-in-use
+++ a/mm/page_alloc.c
@@ -5978,8 +5978,15 @@ done:
void free_contig_range(unsigned long pfn, unsigned nr_pages)
{
- for (; nr_pages--; ++pfn)
- __free_page(pfn_to_page(pfn));
+ unsigned int count = 0;
+
+ for (; nr_pages--; pfn++) {
+ struct page *page = pfn_to_page(pfn);
+
+ count += page_count(page) != 1;
+ __free_page(page);
+ }
+ WARN(count != 0, "%d pages are still in use!\n", count);
}
#endif
_
Patches currently in -mm which might be from m.szyprowski@xxxxxxxxxxx are
origin.patch
linux-next.patch
mm-fix-zone_watermark_ok_safe-accounting-of-isolated-pages.patch
cma-make-putback_lru_pages-call-conditional.patch
cma-make-putback_lru_pages-call-conditional-fix.patch
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