From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FBEC2FE566 for ; Wed, 7 Oct 2026 00:50:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791334260; cv=none; b=NcVqK2y/erwI0gKqnRWnwlLPcxg38dow2JfWCoHFpuq/5T3uwGCsTm+scXEBzgTo8BoUuZPhYv3wLRZgMQU+/E9GX2kWbyG3tlYsCFWesDtAX7GrvIJOefuO0PQ+kltELoD/eor7/uanrmjLtSGUKrpMMMuMG56sWqEwgSs0xg0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791334260; c=relaxed/simple; bh=Ay8K1ZPJXsX7eYo+OKtDOCkg3ZHdTGP4pMVXOgpdQ9M=; h=Date:To:From:Subject:Message-Id; b=ccIzpSRwoVbPwEk6yZtjJWK6Ms6Gz4wSGSFtUF47Jvkb0KkIm/v574A6Wv/9gvgPNDfQqBGqaMxS8zZ41hZxueKWsx4JKN6HrX3naOuPiEXvAzIKQzoQ/K7XRBGMnMGnTFLKGPoLn4b8t9LBkLOvYA7Oh2izN9UBk68mogOg2xg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=swH7S4Qm; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="swH7S4Qm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 442991F0089B; Wed, 7 Oct 2026 00:50:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791334259; bh=hTrTovSqo1p37brVyX7kBVDyOjAXXDTGU7zYlzTTqkw=; h=Date:To:From:Subject; b=swH7S4QmIBn4UxPQ9OLbPpI/+NM+RW4KmCTdSDApSDdOV09SrPy9XqIbG9IHcxEP3 KTX9QRkU325tsKBb2+l17LpEO2MNx2a/5x5u1QwUrZAyemi/Y9UJVxFlqKd+Naq/7m Rgv4USMvDs0IiXn7xEfIxweUsMkO5cETB3O5Jmbo= Date: Tue, 06 Oct 2026 17:50:58 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,vbabka@kernel.org,surenb@google.com,sj@kernel.org,rppt@kernel.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,hannes@cmpxchg.org,david@kernel.org,brendan.jackman@linux.dev,pfalcato@suse.de,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-replace-custom-bad-page-map-ratelimiting-logic.patch removed from -mm tree Message-Id: <20261007005059.442991F0089B@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: replace custom bad page map ratelimiting logic has been removed from the -mm tree. Its filename was mm-replace-custom-bad-page-map-ratelimiting-logic.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Pedro Falcato Subject: mm: replace custom bad page map ratelimiting logic Date: Tue, 11 Aug 2026 18:21:55 +0100 Patch series "mm: replace custom ratelimiting logic". The kernel has a perfectly cromulent and mostly-equivalent variant in lib/ratelimit.c that can be used. This patch (of 2): The current logic (allow up to $BURST prints per minute) can be entirely replaced by the generic version in lib/ratelimit.c, used around the kernel. Do so. The only functional difference should be that the new logs will read something like: KERN_WARNING "print_bad_page_map: %d callbacks suppressed\n", ... But that should be fine enough. Link: https://lore.kernel.org/20260811172156.356053-1-pfalcato@suse.de Link: https://lore.kernel.org/20260811172156.356053-2-pfalcato@suse.de Signed-off-by: Pedro Falcato Signed-off-by: Andrew Morton Acked-by: Johannes Weiner Acked-by: Zi Yan Reviewed-by: SJ Park Acked-by: David Hildenbrand (Arm) Reviewed-by: Lorenzo Stoakes (ARM) Acked-by: Vlastimil Babka (SUSE) Acked-by: Mike Rapoport (Microsoft) Cc: Brendan Jackman Cc: Liam R. Howlett Cc: Michal Hocko Cc: Suren Baghdasaryan --- mm/memory.c | 30 +++--------------------------- 1 file changed, 3 insertions(+), 27 deletions(-) --- a/mm/memory.c~mm-replace-custom-bad-page-map-ratelimiting-logic +++ a/mm/memory.c @@ -492,32 +492,8 @@ static inline void add_mm_rss_vec(struct add_mm_counter(mm, i, rss[i]); } -static bool is_bad_page_map_ratelimited(void) -{ - static unsigned long resume; - static unsigned long nr_shown; - static unsigned long nr_unshown; - - /* - * Allow a burst of 60 reports, then keep quiet for that minute; - * or allow a steady drip of one report per second. - */ - if (nr_shown == 60) { - if (time_before(jiffies, resume)) { - nr_unshown++; - return true; - } - if (nr_unshown) { - pr_alert("BUG: Bad page map: %lu messages suppressed\n", - nr_unshown); - nr_unshown = 0; - } - nr_shown = 0; - } - if (nr_shown++ == 0) - resume = jiffies + 60 * HZ; - return false; -} +/* Allow a burst of 60 bad page map reports per minute. */ +static DEFINE_RATELIMIT_STATE(bad_page_map_ratelimit, 60 * HZ, 60); static void ptval_bytes_to_hex_str(char *buf, size_t buf_size, const void *entry, size_t entry_size) { @@ -633,7 +609,7 @@ static void print_bad_page_map(struct vm char entry_str[PTVAL_STR_MAX]; pgoff_t index, anon_index; - if (is_bad_page_map_ratelimited()) + if (!__ratelimit(&bad_page_map_ratelimit)) return; mapping = vma->vm_file ? vma->vm_file->f_mapping : NULL; _ Patches currently in -mm which might be from pfalcato@suse.de are