On Mon, Aug 12, 2024 at 11:44 AM Suren Baghdasaryan <surenb@xxxxxxxxxx> 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.
This should also have:
Fixes: d224eb0287fb "codetag: debug: mark codetags for reserved pages as empty"
>
> Signed-off-by: Suren Baghdasaryan <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
>
