From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E5ADEC79F9E for ; Mon, 7 Sep 2026 12:42:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=DsQ17ECmHh5xntnZ/2ZOLzA+d2JTqL2yBGqzblNVk8I=; b=RyJCWTMDkcGg/C quY29RvOO9BcvWUnROqjvE603u7jL3vYTqUSB2rX17Jv/Xzsj0ySVkwhGzibocjcfyKk9lQ2SSb9b aO2bP9f8YzogaxCco+byMwyt6JkciJ/MJ/TqPt34CSnxBSRHLrfu6VRB/iLU+awz8/Hgz/aJOEXRr SMfGctneiNFCaPV9zVvbcN/r0JgrI9+B16LCDcKOjGx0xHn1EJXy9jNee7zVV6cERl2Zw7eQ2Hi2v kjKF9BEhceCCfHldYd7Y5JHj/IMlRaLnL3dDNLcXwe7FSG7cQ0TDLXvucPadrqV7hJePy+I66lXrm VuCD5WCOVdSkvaZhjf9A==; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 8/30/26 04:37, Andrew Morton wrote: > On Mon, 03 Aug 2026 04:31:20 -0700 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. > > I wonder if we can fix this. Add a knob which tells the kernel not to > panic/oops/crash/etc. Instead it sends a message "i tried to crash but > you told me not to" and proceeds. > > Set that knob around your hwpoison-panic tool and voila, it's now a > selftest. We just shot down a random "kernel-owned PFN" (marking it hwpoison etc). That's really not something you want to do from a selftest. You'd need some kind of hwpoison simulation mode. -- Cheers, David _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv