Re: [PATCH v2 2/2] virtio_balloon: replace oom notifier with shrinker

[Wei Wang <wei.w.wang@intel.com>]

On 08/02/2018 07:00 PM, Tetsuo Handa wrote:
> On 2018/08/02 19:32, Wei Wang wrote:
> > On 08/01/2018 07:34 PM, Michal Hocko wrote:
> > > Do you have any numbers for how does this work in practice?
> > It works in this way: for example, we can set the parameter, balloon_pages_to_shrink,
> > to shrink 1GB memory once shrink scan is called. Now, we have a 8GB guest, and we balloon
> > out 7GB. When shrink scan is called, the balloon driver will get back 1GB memory and give
> > them back to mm, then the ballooned memory becomes 6GB.
> Since shrinker might be called concurrently (am I correct?),

Not sure about it being concurrently, but I think it would be called 
repeatedly as should_continue_reclaim() returns true.


Best,
Wei