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Date:   Thu, 13 Apr 2017 10:03:46 -0700
From:   Matthew Wilcox <>
To:     "Michael S. Tsirkin" <>
Cc:     Wei Wang <>,,,,,,,,,,,,,,,
Subject: Re: [PATCH v9 2/5] virtio-balloon: VIRTIO_BALLOON_F_BALLOON_CHUNKS

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 ...

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