Re: [PATCH RFC 01/10] vmalloc: Add basic perm alloc implementation

[Christoph Hellwig]

On Mon, Nov 23, 2020 at 12:01:35AM +0000, Edgecombe, Rick P wrote:
> Another option could be putting the new metadata in vm_struct and just
> return that, like get_vm_area(). Then we don't need to invent a new
> struct. But then normal vmalloc()'s would have a bit of wasted memory
> since they don't need this metadata.

That would seem most natural to me.  We'll need to figure out how we
can do that without bloating vm_struct too much.  One option would
be a bigger structure that embedds vm_struct and can be retreived using
container_of().