Re: [LSF/MM/BPF TOPIC] Guaranteed CMA

[Suren Baghdasaryan <surenb@google.com>]

On Tue, Feb 4, 2025 at 1:03 AM Vlastimil Babka <vbabka@suse.cz> wrote:
>
> On 2/4/25 06:46, Christoph Hellwig wrote:
> > On Sat, Feb 01, 2025 at 04:19:25PM -0800, Suren Baghdasaryan wrote:
> >> Hi,
> >> I would like to discuss the Guaranteed Contiguous Memory Allocator
> >> (GCMA) mechanism that is being used by many Android vendors as an
> >> out-of-tree feature, collect input on its possible usefulness for
> >> others, feasibility to upstream and suggestions for possible better
> >> alternatives.
> >
> > Well, start by having code on the list.  We really need to stop all
> > these super hypothetical "wouldn't it be nice" discussions clogging up
> > the conferences.
>
> A bit later the email says:
>
> > GCMA (Guaranteed CMA) is a mechanism previously proposed in [1] which
> > was not upstreamed but got adopted later by many Android vendors as an
>
> [1] https://lore.kernel.org/lkml/1424721263-25314-2-git-send-email-sj38.park@gmail.com/

Yeah, the link above can be used as a reference to get the idea about
this feature. I'll try to post a new version before the conference but
that requires some discussions with Android vendors to ensure we don't
miss anything they need (each of them might have tweaked their
implementation).