On 12.08.24 21:24, Suren Baghdasaryan wrote:
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); + } + }
Should we have a helper like clear_page_tag_ref() that wraps this? -- Cheers, David / dhildenb
