From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 EEE272C21D9 for ; Tue, 24 Feb 2026 11:00:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771930824; cv=none; b=AbWiyONMF/jMAnkWhoT+RT4nWluUoTUcOHEsUpfoghMj0oqW6ruM1LApBD7tgGy+jASu9gdjFWHSpAIEUh97dbpNxNSj/l54qBHVTCDGtmbhE38Ii0sUI+/u4yw5V412PaHMQp4WMPHzRq4d5LdwW28AQQ+iNCCl3h4Bcy0lzqA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771930824; c=relaxed/simple; bh=sp1M4Ecc7+UyoVNV1sWpueKrBy61exxNm/nEsh4CawY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Fu81htoJ2JNroCu42WfOAzKSBxo3/nxB0IOO+EBKaR4tB2oQpCCTHXoIVPZ+tZBWi7PGB8qWCERs5GsoAIWpYlscNjFmHNE2c+8bVLRsgomqgheqQZbjXTCrm4uGk/ktnZdV4R4H753xuPesDXUlvkKaSGjYESJywepX2gPiYZ8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gN62UtsA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gN62UtsA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8AEEDC116D0; Tue, 24 Feb 2026 11:00:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771930823; bh=sp1M4Ecc7+UyoVNV1sWpueKrBy61exxNm/nEsh4CawY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=gN62UtsA6LT4fYW6UioynrJkR2jF1vx72Sxb4EktxYCQz/zxjx/HO1ha2EMV/7sDK +0NB0gB8lOBEu4loFmQCQxGpmN+7aneDObggIC4edrgt8DWDGweEEehPLen5nFEhaT CUL6Xixlwz2wUYr/ootObaPXd7N1WAxIQcK2f8LragVSfwtCcGkUbYuK69EnCipb2j uehBhQK6QDOMZelnhk4WsWgMfx/v8IaVKdVi/lvgAUIorRPwN03QpE5pNLzlZk+ayo 3MszTbK4fMkTuPeOxLnRxJOFAlhvtnchTF8TUBuDwSh/bc7NXLf6fv5sFbG+oIMp6L nwFKYnQu6lT5Q== Message-ID: <13b8d60d-1209-4650-9fa5-982381c53512@kernel.org> Date: Tue, 24 Feb 2026 12:00:17 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: mm: Regression with v7.0-rc1 on RISC-V To: Ron Economos , wangkefeng.wang@huawei.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Cc: ziy@nvidia.com, jackmanb@google.com, jane.chu@oracle.com, hannes@cmpxchg.org, willy@infradead.org, muchun.song@linux.dev, osalvador@suse.de, sidhartha.kumar@oracle.com, vbabka@suse.cz, claudiu.beznea.uj@bp.renesas.com, Mark Brown , akpm@linux-foundation.org, pjw@kernel.org References: <1b17c38f-30d3-4bb4-a7e1-e74b19ada885@w6rz.net> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 2/24/26 09:37, Ron Economos wrote: > I'm getting a BUG dump during shutdown with Linux v7.0-rc1 on RISC-V. > > [  OK  ] Reached target shutdown.target - System Shutdown. > [  OK  ] Reached target final.target - Late Shutdown Services. > [  OK  ] Finished systemd-reboot.service - System Reboot. > [  OK  ] Reached target reboot.target - System Reboot. > [  173.985249] BUG: Bad page state in process shutdown  pfn:f8850 > [  173.985311] page: refcount:1 mapcount:0 mapping:0000000000000000 > index:0x0 pfn:0xf8850 > [  173.985336] flags: 0xffff80000000000(node=0|zone=0| > lastcpupid=0x1ffff) CMA > [  173.985365] raw: 0ffff80000000000 ffffffc501e21448 ffffffc600f2ae88 > 0000000000000000 > [  173.985386] raw: 0000000000000000 0000000000000000 00000001ffffffff > 0000000000000000 > [  173.985403] page dumped because: nonzero _refcount So, we're freeing something from CMA in cma_release(). In cma_release() we iterate all pages to decrement their refcount VM_WARN_ON(!put_page_testzero(pfn_to_page(pfn))); I would expect that this would fire already if there is still a page referenced. Are you running with CONFIG_DEBUG_VM=y ? -- Cheers, David