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.
Fixes: d224eb0287fb ("codetag: debug: mark codetags for reserved pages as empty")
Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v6.10
---
changes since v1 [1]
- Added Fixes tag
- CC'ed stable
[1] https://lore.kernel.org/all/20240812184455.86580-1-surenb@xxxxxxxxxx/
mm/mm_init.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 75c3bd42799b..ec9324653ad9 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -2245,6 +2245,16 @@ 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 */
+ if (mem_alloc_profiling_enabled()) {
+ union codetag_ref *ref = get_page_tag_ref(page);
+
+ if (ref) {
+ set_codetag_empty(ref);
+ put_page_tag_ref(ref);
+ }
+ }
__free_pages(page, pageblock_order);
adjust_managed_page_count(page, pageblock_nr_pages);
base-commit: d74da846046aeec9333e802f5918bd3261fb5509
--
2.46.0.76.ge559c4bf1a-goog
