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 2400E5A513C for ; Fri, 11 Sep 2026 20:39:18 +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=1789159161; cv=none; b=EHxevxY5GbMIzdE3OitL1wju0tbbhT6jvRyaYWXO838PBmV82YHGVTCrpud5yIGt/cQzKnjw1RFe3POaBhpKAyiVPAPdLrrv5vsPEm6VVAatl8JxbOhCBvyUsOmgfkaiEqkaFaSxoDGk0y3lkMwz7ZjzPY58hzO1hRYKuaGtCsA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789159161; c=relaxed/simple; bh=Dw+xWmgWe30kDiqe8ljICXM5nUZnmcQTAn5NauTr5as=; h=Date:To:From:Subject:Message-Id; b=Gdx/gWszuL6YfqLppTP5NOTnt2CzhYE9ltXdemgpLb7Fvi3l6A25PeoYQOH1mK5jfIaPx0aIYkPFwRsuMWsl+668MSNgBvPSa7U5v7b/NREwnnwHybHv4QS0rJL8SKIwR4L5e2iLZqvPvJxHRnbrtU0IEQlZjU/mmjW3u2l56ig= 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=NAUJMPoH; 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="NAUJMPoH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC5581F000FF; Fri, 11 Sep 2026 20:39:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789159155; bh=fbePu2BWHwfG4pb5ntfbGrbAPZY0Ao2rNv0GD83Npwo=; h=Date:To:From:Subject; b=NAUJMPoHETXx/hmBCYtACPMtSEHEp68k6REaIk+OAYXhhopmQ6mO/V6aTN7XIL7LX BjOMIIOaJOvpeLcCIb4qE5eZ0FOHoYqmj/Q/EXaK2l868kPoQA1iJ5sHxlTwAuG/Sl 8YpmcmZ7w/2pNFNg8fAKLa5cPiIXve5tuHsLkQMw= Date: Fri, 11 Sep 2026 13:39:15 -0700 To: mm-commits@vger.kernel.org,ynorov@nvidia.com,willy@infradead.org,linux@rasmusvillemoes.dk,liam@infradead.org,andrewjballance@gmail.com,aliceryhl@google.com,yury.norov@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: + lib-fix-lock-initialization-in-region-allocation-benchmark.patch added to mm-new branch Message-Id: <20260911203915.CC5581F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: lib: fix lock initialization in region allocation benchmark has been added to the -mm mm-new branch. Its filename is lib-fix-lock-initialization-in-region-allocation-benchmark.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-fix-lock-initialization-in-region-allocation-benchmark.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Yury Norov Subject: lib: fix lock initialization in region allocation benchmark Date: Fri, 11 Sep 2026 11:52:43 -0400 The Maple Tree benchmark uses MTREE_INIT() for a stack-allocated tree. Its static spinlock initializer leaves lockdep to use the lock address as the class key. Since the address is on the stack, the first allocation triggers "INFO: trying to register non-static key" and disables lockdep. The IDA benchmark has the same problem through IDA_INIT(), but runs after Maple Tree and therefore encounters an already disabled lockdep. Use mt_init_flags() and ida_init() to initialize the locks with persistent lock-class keys. Keep initialization outside the timed allocation paths. Link: https://lore.kernel.org/20260911155244.1406122-1-ynorov@nvidia.com Fixes: f4806cc63cc6 ("lib: test bitmap vs IDA vs Maple Tree performance for region allocations") Signed-off-by: Yury Norov Closes: https://lore.kernel.org/oe-lkp/202609101106.771b567e-lkp@intel.com Cc: Alice Ryhl Cc: Andrew Ballance Cc: Liam R. Howlett Cc: Matthew Wilcox (Oracle) Cc: Rasmus Villemoes Signed-off-by: Andrew Morton --- lib/region_alloc_benchmark.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- a/lib/region_alloc_benchmark.c~lib-fix-lock-initialization-in-region-allocation-benchmark +++ a/lib/region_alloc_benchmark.c @@ -78,11 +78,13 @@ static size_t __init ida_size(unsigned l static unsigned long __init benchmark_ida(unsigned long cap) { - struct ida ida = IDA_INIT(ida); + struct ida ida; unsigned long cnt, idx, off, nr_ids = 0; ktime_t alloc_time, free_time; int id = -ENOSPC; + ida_init(&ida); + alloc_time = ktime_get(); for (cnt = 0; cnt <= cap; cnt++) { for (off = 0; off < reg_sz[cnt]; off++) { @@ -125,12 +127,14 @@ static unsigned long __init benchmark_id static unsigned long __init benchmark_maple_tree(unsigned long cap) { - struct maple_tree mt = MTREE_INIT(mt, MT_FLAGS_ALLOC_RANGE); + struct maple_tree mt; unsigned long cnt, idx; ktime_t alloc_time, free_time; size_t sz; int ret; + mt_init_flags(&mt, MT_FLAGS_ALLOC_RANGE); + alloc_time = ktime_get(); for (cnt = 0; cnt <= cap; cnt++) { ret = mtree_alloc_range(&mt, &idx, xa_mk_value(cnt + 1), _ Patches currently in -mm which might be from yury.norov@gmail.com are lib-fix-lock-initialization-in-region-allocation-benchmark.patch