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authorSuren Baghdasaryan <surenb@google.com>2024-08-13 17:07:57 +0200
committerAndrew Morton <akpm@linux-foundation.org>2024-08-16 07:16:16 +0200
commit766c163c2068b45330664fb67df67268e588a22d (patch)
treedd06c2f510f7ddade3a7e4a6956df47c24fe37f1 /mm
parentalloc_tag: introduce clear_page_tag_ref() helper function (diff)
downloadlinux-766c163c2068b45330664fb67df67268e588a22d.tar.xz
linux-766c163c2068b45330664fb67df67268e588a22d.zip
alloc_tag: mark pages reserved during CMA activation as not tagged
During CMA activation, pages in CMA area are prepared and then freed without being allocated. This triggers warnings when memory allocation debug config (CONFIG_MEM_ALLOC_PROFILING_DEBUG) is enabled. Fix this by marking these pages not tagged before freeing them. Link: https://lkml.kernel.org/r/20240813150758.855881-2-surenb@google.com Fixes: d224eb0287fb ("codetag: debug: mark codetags for reserved pages as empty") Signed-off-by: Suren Baghdasaryan <surenb@google.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> [6.10] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--mm/mm_init.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/mm_init.c b/mm/mm_init.c
index adc3127573cd..51960079875b 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2244,6 +2244,8 @@ void __init init_cma_reserved_pageblock(struct page *page)
set_pageblock_migratetype(page, MIGRATE_CMA);
set_page_refcounted(page);
+ /* pages were reserved and not allocated */
+ clear_page_tag_ref(page);
__free_pages(page, pageblock_order);
adjust_managed_page_count(page, pageblock_nr_pages);