Am 30.11.2016 um 09:43 schrieb Liang Li:

This patch set contains two parts of changes to the virtio-balloon.

One is the change for speeding up the inflating & deflating process,
the main idea of this optimization is to use bitmap to send the page
information to host instead of the PFNs, to reduce the overhead of
virtio data transmission, address translation and madvise(). This can
help to improve the performance by about 85%.

Do you have some statistics/some rough feeling how many consecutive bits 
are usually set in the bitmaps? Is it really just purely random or is 
there some granularity that is usually consecutive?

IOW in real examples, do we have really large consecutive areas or are 
all pages just completely distributed over our memory?

Thanks!

-- 

David

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