Re: [PATCH v2] mm: cma: support sysfs

[John Hubbard]

On 2/8/21 3:36 PM, Minchan Kim wrote:
...
> > >    	char name[CMA_MAX_NAME];
> > > +#ifdef CONFIG_CMA_SYSFS
> > > +	struct cma_stat	*stat;
> >
> > This should not be a pointer. By making it a pointer, you've added a bunch of pointless
> > extra code to the implementation.
>
> Originally, I went with the object lifetime with struct cma as you
> suggested to make code simple. However, Greg KH wanted to have
> release for kobj_type since it is consistent with other kboject
> handling.

Are you talking about the kobj in your new struct cma_stat? That seems
like circular logic if so. I'm guessing Greg just wanted kobj methods
to be used *if* you are dealing with kobjects. That's a narrower point.

I can't imagine that he would have insisted on having additional
allocations just so that kobj freeing methods could be used. :)


thanks,
--
John Hubbard
NVIDIA