Re: [PATCH v3] mm/memory_hotplug: Fix try_offline_node()

[David Hildenbrand]

On 05.11.19 02:20, Masayoshi Mizuma wrote:
> 5.4-rc5 with this patch works for memory-hotadd and remove, thanks!
> Please feel free to add:
>
>      Tested-by: Masayoshi Mizuma <m.mizuma@xxxxxxxxxxxxxx>
>
> Without this patch, memory hotplug fails as panic:
>
>   BUG: kernel NULL pointer dereference, address: 0000000000000000
>   ...
>   Call Trace:
>    remove_memory_block_devices+0x81/0xc0
>    try_remove_memory+0xb4/0x130
>    ? walk_memory_blocks+0x75/0xa0
>    __remove_memory+0xa/0x20
>    acpi_memory_device_remove+0x84/0x100
>    acpi_bus_trim+0x57/0x90
>    acpi_bus_trim+0x2e/0x90
>    acpi_device_hotplug+0x2b2/0x4d0
>    acpi_hotplug_work_fn+0x1a/0x30
>    process_one_work+0x171/0x380
>    worker_thread+0x49/0x3f0
>    kthread+0xf8/0x130
>    ? max_active_store+0x80/0x80
>    ? kthread_bind+0x10/0x10
>    ret_from_fork+0x35/0x40
>
> - Masa

Thanks a lot for testing!

--

Thanks,

David / dhildenb