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

On 2026/8/13 19:45, 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.
> 
> Signed-off-by: Breno Leitao <[email protected]>

Thanks for your update. LGTM.

Reviewed-by: Miaohe Lin <[email protected]>

Thanks.
.

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