RE: [PATCH v6 kernel 3/5] virtio-balloon: speed up inflate/deflate process

[Li, Liang Z]

> <snip>
> 
> > +static void free_extended_page_bitmap(struct virtio_balloon *vb) {
> > +	int i, bmap_count = vb->nr_page_bmap;
> > +
> > +	for (i = 1; i < bmap_count; i++) {
> > +		kfree(vb->page_bitmap[i]);
> > +		vb->page_bitmap[i] = NULL;
> > +		vb->nr_page_bmap--;
> > +	}
> > +}
> > +
> > +static void kfree_page_bitmap(struct virtio_balloon *vb) {
> > +	int i;
> > +
> > +	for (i = 0; i < vb->nr_page_bmap; i++)
> > +		kfree(vb->page_bitmap[i]);
> > +}
> 
> It might be worth commenting that pair of functions to make it clear why
> they are so different; I guess the kfree_page_bitmap is used just before you
> free the structure above it so you don't need to keep the count/pointers
> updated?
> 

Yes. I will add some comments for that. Thanks!

Liang
 
> Dave
> --
> Dr. David Alan Gilbert / dgilbert@xxxxxxxxxx / Manchester, UK