Re: [PATCH v2] dma-contiguous: define proper name for global cma region

[Pintu Agarwal]

Hi Christoph,
Thank you so much for your review and comments.

On Mon, 31 Jul 2023 at 16:51, Christoph Hellwig <hch@xxxxxx> wrote:
>
> Hi Pintu,
>
> On Sat, Jul 29, 2023 at 08:05:15AM +0530, Pintu Kumar wrote:
> > The current global cma region name defined as "reserved"
> > which is misleading, creates confusion and too generic.
> >
> > Also, the default cma allocation happens from global cma region,
> > so, if one has to figure out all allocations happening from
> > global cma region, this seems easier.
> >
> > Thus, change the name from "reserved" to "global-cma-region".
>
> I agree that reserved is not a very useful name.  Unfortuately the
> name of the region leaks to userspace through cma_heap.
>
> So I think we need prep patches to hardcode "reserved" in
> add_default_cma_heap first, and then remove the cma_get_name
> first.

Sorry, but I could not fully understand your comments.
Can you please elaborate a little more what changes are required in
cma_heap if we change "reserved" to "global-cma-region" ?
You mean to say there are userspace tools that rely on this "reserved"
naming for global cma ?