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

From: Wei Wang
Date: Thu Aug 02 2018 - 12:03:39 EST

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.