[PATCH v3] tools/mm: add hwpoison-panic tool

[David Hildenbrand (Arm)]

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: <pfn>: 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