Re: [PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS

[Matthew Wilcox]

On Thu, Apr 13, 2017 at 07:34:19PM +0300, Michael S. Tsirkin wrote:
> So we don't need the bitmap to talk to host, it is just
> a data structure we chose to maintain lists of pages, right?
> OK as far as it goes but you need much better isolation for it.
> Build a data structure with APIs such as _init, _cleanup, _add, _clear,
> _find_first, _find_next.
> Completely unrelated to pages, it just maintains bits.
> Then use it here.

That sounds an awful lot like the xbitmap I wrote a few months ago ...

http://git.infradead.org/users/willy/linux-dax.git/commit/727e401bee5ad7d37e0077291d90cc17475c6392