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From:   Alex Gaynor <alex.gaynor@gmail.com>
Date:   Tue, 27 Apr 2021 11:22:23 -0400
Message-ID: <CAFRnB2U6cXM3V2-cFXPMXBo-BxbzBMNb=PSX9GzW2qwvSs_Fjw@mail.gmail.com>
Subject: Re: Question on Box<T> smart pointer
To:     Fabio Aiuto <fabioaiuto83@gmail.com>
Cc:     rust-for-linux <rust-for-linux@vger.kernel.org>
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Box<T> in the kernel allocates on the kernel heap, via kmalloc. This
is done by providing a Rust GlobalAllocator:
https://github.com/Rust-for-Linux/linux/blob/rust/rust/kernel/allocator.rs#L11

Alex

On Tue, Apr 27, 2021 at 11:20 AM Fabio Aiuto <fabioaiuto83@gmail.com> wrote:
>
> Hi all,
>
> I have a question. There's one thing I miss.
>
> If Box<T> smart pointer allows allocating space on the heap,
> how is this behaviour overridden in linux kernel Rust?
>
> I mean, in c we have all API's to allocate heap space,
> but using "pure" Box<T> in kernel space what kind of
> allocation provides?
>
> If this question is stupid I apologize in advance,
>
> thank you,
>
> fabio



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