From nobody Thu Feb 12 09:16:57 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDDDBC77B61 for ; Tue, 25 Apr 2023 22:25:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236404AbjDYWZE (ORCPT ); Tue, 25 Apr 2023 18:25:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236370AbjDYWY7 (ORCPT ); Tue, 25 Apr 2023 18:24:59 -0400 Received: from mail-il1-x134.google.com (mail-il1-x134.google.com [IPv6:2607:f8b0:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 135555FF1 for ; Tue, 25 Apr 2023 15:24:59 -0700 (PDT) Received: by mail-il1-x134.google.com with SMTP id e9e14a558f8ab-32933a4af12so53202195ab.3 for ; Tue, 25 Apr 2023 15:24:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1682461497; x=1685053497; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jG/BDMHjgp3Q/HYzobpU+Hf19DrO0mL4F7UMWoWu2Oo=; b=XHPOtqYEtkGUjozmoPSo3Xc/K1hM/UIrcAJOhoUdMcmRih9e+CrQwSBdyz5+uk4giS PhZMhIyQxVcFDe44aZHvMwhdltHKrHat0LnNOiy/J3OuH8SiXpd43EW0v3znmK4uGpgY CnXKLLTkJMbqErUqw6G2/LuUYABi3l/yz0Vs252PE6PKlUdxWq038717JEpZfZxbM+/R yMvneeIJ6mTETaffHRt6/ysgwNkFM0BNxagFZWFLxBye/2Dy5/TUmBBX0bb+rQ8Mnz0g O37rQ1jE+ei/S9K1Jtt40XTa0vUtQAbCcRxWyxxGy7urxLt51SH4X0+3FHiKqW0JDTtj /ZHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682461497; x=1685053497; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jG/BDMHjgp3Q/HYzobpU+Hf19DrO0mL4F7UMWoWu2Oo=; b=loclrCmkfLWTvb48f918meFSElZpE4dNTtZ2pIqxngcqI5OG/hQ/mKyrNj67Utk+nr ifg+4HlxiyBLaBm0hdGv2hEUwEt5JUwCiyYP2Y6dvY7f4Rw477IG52RLB89St68BvOM/ vzUDO7gnQxqNaai9YKsAQNDKc/gsBJiaZ7lbS1MpbZSpLY1YUlMozCEkfJj/O3z1g5hW J+NkgETHVlR4adhtkPxQ2wDWDJu/6EgetVtQmQwLtiJUlvPzorjlUXm1sjWkMHZH03wm dnpYFX8Zp23UfbEdTKJTmHZaleCnZAeGHKBKzhWop4oEa3mQdI77iZkesWQqn3vStjdM tlYw== X-Gm-Message-State: AAQBX9dUXXYMFZ36xfy3DNgkMKOWCO/Pbv8mizmd49pgzapJ6B4npoZX TRWkSyoCDrNeMSW5mm7bgfI= X-Google-Smtp-Source: AKy350Zg9B4rDTGuFbqRnS/vnyxu8oWDs4MPw2HnEPWD50fEQ1lkrUGykTcNnYVhQ7niOp+1DbpuXA== X-Received: by 2002:a92:d986:0:b0:32b:399a:afa0 with SMTP id r6-20020a92d986000000b0032b399aafa0mr9245504iln.31.1682461497534; Tue, 25 Apr 2023 15:24:57 -0700 (PDT) Received: from frodo.. (c-73-78-62-130.hsd1.co.comcast.net. [73.78.62.130]) by smtp.googlemail.com with ESMTPSA id 13-20020a92180d000000b003244d7f2292sm3833008ily.32.2023.04.25.15.24.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Apr 2023 15:24:56 -0700 (PDT) From: Jim Cromie To: catalin.marinas@arm.com, linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Jim Cromie Subject: [PATCH 2/3] kmemleak: add checksum to backtrace report Date: Tue, 25 Apr 2023 16:24:45 -0600 Message-Id: <20230425222446.170486-3-jim.cromie@gmail.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230425222446.170486-1-jim.cromie@gmail.com> References: <20230425222446.170486-1-jim.cromie@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" change kmemleak report format: from: " backtrace:" to: " backtrace (ck ):" The allows a user to see recurring backtraces without detailed/careful reading of multiline backtraces. So after cycling kmemleak-test a few times, I know some leaks are repeating. bash-5.2# grep backtrace /sys/kernel/debug/kmemleak | wc 62 186 1792 bash-5.2# grep backtrace /sys/kernel/debug/kmemleak | sort -u | wc 37 111 1067 Signed-off-by: Jim Cromie --- mm/kmemleak.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index f025c7bc845b..2d1dfed4293d 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -362,7 +362,7 @@ static void print_unreferenced(struct seq_file *seq, warn_or_seq_printf(seq, " comm \"%s\", pid %d, jiffies %lu\n", object->comm, object->pid, object->jiffies); hex_dump_object(seq, object); - warn_or_seq_printf(seq, " backtrace:\n"); + warn_or_seq_printf(seq, " backtrace (ck %u):\n", object->checksum); =20 for (i =3D 0; i < nr_entries; i++) { void *ptr =3D (void *)entries[i]; --=20 2.40.0