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charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/4/26 15:43, Breno Leitao wrote: > On Wed, Nov 04, 2026 at 03:35:16PM +0100, David Hildenbrand (Arm) wrote: >> 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? > > Right. :-( > >> Anything missing or is this good to go in? > > I would say this is good to go, David. Agreed, nothing jumped at me and this is useful. Acked-by: David Hildenbrand (Arm) @Andrew will you pick this up? -- Cheers, David