[Qemu-devel] Re: [PATCH 02/10] Add buffered_file_internal constant

[Michael S. Tsirkin]

On Tue, Nov 30, 2010 at 08:02:56AM -0600, Anthony Liguori wrote:
> If we're burning excess CPU walking a 100MB bitmap, then let's fix
> that problem.  Stopping every 1MB worth of the bitmap to do other
> work just papers over the real problem (that we're walking 100MB
> bitmap).

Just using a bit per page will already make the problem 8x smaller,
won't it?  Is that enough to avoid the need for a new kernel interface?

-- 
MST