Re: [PATCH] Add a page cache-backed balloon device driver.

On Tue, Sep 11, 2012 at 12:10:18AM +0300, Michael S. Tsirkin wrote:

quoted

On the plus side, having an exit taken here on each page turns out to
be relatively cheap, as the vmexit from the page fault should be
faster to process as it is fully handled within the host kernel.

Perhaps some combination of both methods is required? I'm not sure :\

Perhaps some benchmarking is in order :)
Can you try telling host, potentially MADV_WILL_NEED
in that case like qemu does, then run your proprietary test
and see if things work well enough?

Ping. Had a chance to try that?

-- 
MST