Re: [PATCH] rust: page: implement BorrowedPage

[Andreas Hindborg <a.hindborg@kernel.org>]

"Daniel Almeida" <daniel.almeida@collabora.com> writes:

>> On 5 Aug 2025, at 09:53, Danilo Krummrich <dakr@kernel.org> wrote:
>>
>> On Tue Aug 5, 2025 at 2:30 PM CEST, Daniel Almeida wrote:
>>> Hi Danilo,
>>>
>>>> On 4 Aug 2025, at 16:50, Danilo Krummrich <dakr@kernel.org> wrote:
>>>>
>>>> Currently, a Page always owns the underlying struct page.
>>>>
>>>> However, sometimes a struct page may be owned by some other entity, e.g.
>>>> a vmalloc allocation.
>>>>
>>>> Hence, introduce BorrowedPage to support such cases, until the Ownable
>>>> solution lands.
>>>
>>> I guess it’s a good idea to expand this part somewhat. Taken as it is,
>>> there is no way to know what “the Ownable solution” is.
>>
>> What do you suggest?
>>
>> I can link where the type has been proposed by Boqun [1].
>>
>> [1] https://lore.kernel.org/rust-for-linux/ZnCzLIly3DRK2eab@boqun-archlinux/
>
> Just this link is fine IMHO. I wasn’t aware of this discussion.
>

As far as I know, "[PATCH v11 0/4] New trait OwnableRefCounted for
ARef<->Owned conversion." [1] is the latest and greatest.


Best regards,
Andreas Hindborg


[1] https://lore.kernel.org/r/20250618-unique-ref-v11-0-49eadcdc0aa6@pm.me