Re: [PATCH V3 01/16] machine: anon-alloc option

[Peter Xu]

On Fri, Nov 01, 2024 at 06:47:40AM -0700, Steve Sistare wrote:
> @@ -1849,6 +1852,35 @@ static void ram_block_add(RAMBlock *new_block, Error 
> **errp)
>                  qemu_mutex_unlock_ramlist();
>                  return;
>              }
> +
> +        } else if (current_machine->anon_alloc == ANON_ALLOC_OPTION_MEMFD &&
> +                   !object_dynamic_cast(new_block->mr->parent_obj.parent,
> +                                        TYPE_MEMORY_BACKEND)) {

Steve,

I think I'll postpone a few days on reading the whole series for other
things.. as I think this will miss 9.2 anyway (but we can see whether we
can still get it in early 10.0).

Said that, I want to mention this early that there was concern raised on
using block->mr->parent_obj.parent here to detect mem backends, which can
be error prone.  Please have a look at the discussion in v2 for that.

https://lore.kernel.org/qemu-devel/Zv7C7MeVP2X8bEJU@x1n/

-- 
Peter Xu