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 9377950E58C; Fri, 18 Sep 2026 15:54:16 +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=1789746857; cv=none; b=TJ/b1WfSsochh5NpZNdqYlQa3gelxguQUBrIGpyJSWoVfKzy1EGB7GGlveU36GPHxGxOaRkO4UxQCali8P5bEdBZgY6ijuLnVBCWQV4heD3LrW5a9ukfh4FCz5e5AcRE+TPTTrhGJZ91oq7JSCNI4dHEH9XyHL1Vv3AzTWf/qto= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789746857; c=relaxed/simple; bh=3s7VlBXzyG/7kkPBeLoAsKSYxsk1tpal6C8re4CJx/o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c/Ep1kn8sOt8k3N3uEimbXT1Ookhjn8oeLJmX1QQuEAW0UyExiuEkVWyKXHVwDTIs7XAM9HuTAlTDBrfwKIfjOF/LifN6vXbXpf/t5OfyDch6Q2YP15pdKxW09ikujVNBXuW7udvZmFenVTIRYZLx7J5ZfuoPQemHxgwgWSYSPs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M2csbtW7; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="M2csbtW7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0AB621F000FF; Fri, 18 Sep 2026 15:54:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789746856; bh=Y2vNMwDTnqcaVkXWIfYrhaeqbE/xwCCl/dlgb1QGIp8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=M2csbtW7rMlnqlWP9OYhkOYw0fYqp8jO/ODx1nvxvIrQ/z5/IkeqMiADtNXtXZmv/ AI08bg3croc0dnePAJ1Zm2gtJwX2ruOkJQaM7iW0Mys9xvSpC6c+97EpsRAWw2uJM3 dtC1Gbtbk0GATB31GjT2Bs3taY8Mwl6iP55zkTQxxPjGfO5n/lCbC89NkbnJx20Qkx zM+QIdULVGFDSD878yLhfC9EUFZwFIwvk6ZmvxhS3emswPrYSgef0XbQ3qywTUZ4vx p3QJzQGKTh88cE+WfwT/IELvpZbwVN+FlvrlQh3Np/2ivcdKH59o4+SUySF47d2VCi z4LdzK4z3b/iA== From: Sasha Levin To: Brett A C Sheffield , Greg Kroah-Hartman Cc: Sasha Levin , stable@vger.kernel.org, patches@lists.linux.dev, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, linux@roeck-us.net, shuah@kernel.org, patches@kernelci.org, lkft-triage@lists.linaro.org, pavel@nabladev.com, jonathanh@nvidia.com, f.fainelli@gmail.com, sudipm.mukherjee@gmail.com, rwarsow@gmx.de, conor@kernel.org, hargar@microsoft.com, broonie@kernel.org, achill@achill.org, sr@sladewatkins.com, Peter Schneider Subject: Re: [PATCH 6.12 0000/1102] 6.12.111-rc1 review Date: Fri, 18 Sep 2026 11:54:04 -0400 Message-ID: <20260918151137.2101477302-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <0dc35fd5-ee4c-4140-b154-78a49981ddb7@googlemail.com> References: <20260917151539.408551884@linuxfoundation.org> <0dc35fd5-ee4c-4140-b154-78a49981ddb7@googlemail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Thu, Sep 17, 2026 at 10:19:33PM +0200, Peter Schneider wrote: > When I revert 22ae428b0045981bd19f8c75f700a67198062f32 from rc1, the > boot crash goes away and my machine boots successfully. Thanks for confirming, and for the crash photo from the Ivy Bridge box in your earlier mail - that is the same bug. Dropped from the 6.12 queue: b1b7c045e808 ("mm/hugetlb: initialize gigantic bootmem hugepage struct pages earlier") The backport relocates gather_bootmem_prealloc() into page_alloc_init_late(), which on 6.12 runs before anything has initialized the per-node huge_boot_pages[] list heads - upstream that is done unconditionally in hugetlb_bootmem_alloc() since v6.15, which 6.12 does not have. Any CONFIG_HUGETLB_PAGE=y kernel booted without hugepagesz=/hugepages= walks an all-zero list head and faults. > However, then I have another weirdo in the dmesg output: > [ 65.573307] WARNING: CPU: 14 PID: 0 at kernel/sched/fair.c:5303 > place_entity+0x13b/0x140 That one is a separate 6.12 problem and your follow-up bisect nailed it - I've replied there with what was dropped for it. -- Thanks, Sasha