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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=oUiXfXRG; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 54CD0606A31B for ; Wed, 4 Nov 2026 14:35:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=oUiXfXRG Received: by smtp.kernel.org (Postfix) with ESMTPSA id C36F01F0093A; Wed, 4 Nov 2026 14:35:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793802926; bh=259c1LmT7AqmM/9aZ6KRKIwG0j1/LADB8Zw7QHVbn7g=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=oUiXfXRGMzDrLRdd6T0Oich0vIauJ1IxXJ1dFn9HNlQS7VRbIEYQoO5icKIFbDYQr FIesjkf53ezMftVt9AD4US0AhPM55AOt/3/t0+EPXznJHtv46pzaI/tqJWeBBhawhp ah2Z+RrmBGaLz/vTFwdBuZRRAC5Yx6UswFArajHFusFtCw7BjkTb1Z9G5ygQztzj0X oZQ+pC6lBBtSH80vJoKzQmhxC4Xu7t4+iMh9oIXUuwMnMNQ53p4tBhIuK3Lh6et0NY 42k7EbDFannFvNeheyUQyuk+7awK7cJqVO7kQvbL6Ly+M4C2cMDqvLbMOR6aJBA5/j DOKbg8gShIJOQ== Message-ID: <12f80449-9d6c-4fb7-bcc4-e7d38e868da2@kernel.org> Date: Wed, 4 Nov 2026 15:35:16 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] tools/mm: add hwpoison-panic tool To: Breno Leitao , Andrew Morton , Miaohe Lin , Naoya Horiguchi , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: SJ Park , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, kernel-team@meta.com References: <20260813-memory_failure_rewrite_test-v3-1-f9fb6542cbff@debian.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 8/13/26 13:45, Breno Leitao wrote: > Add a tool that enables the vm.panic_on_unrecoverable_memory_failure > sysctl, picks a kernel-owned PFN and writes its physical address to > hard_offline_page. Three page kinds are selectable with -k: rodata > (default), slab or pgtable. In all cases the host should panic. > > Example: > > # ./hwpoison-panic -k slab --yes-panic-my-kernel > injecting hwpoison at phys 0x100032000 (pfn 0x100032, kind=slab) > expecting kernel panic: 'Memory failure: : unrecoverable page' > > In dmesg, you will see: > > Memory failure: 0x100032: unhandlable page. > Memory failure: 0x100032: recovery action for reserved kernel page: Ignored > Kernel panic - not syncing: Memory failure: 0x100032: unrecoverable page > > This lives in tools/mm rather than selftests/mm because every successful > run crashes the machine, which is not something to run from CI. > > The --yes-panic-my-kernel argument is required so an accidental > invocation does not take the box down. This is not upstream yet, right? Anything missing or is this good to go in? -- Cheers, David