RE: [PATCH RFC] virtio_balloon: conservative balloon page shrinking

[Wang, Wei W]

On Thursday, February 6, 2020 5:32 PM, David Hildenbrand wrote:
> 
> If the page cache is empty, a drop_slab() will deflate the whole balloon if I
> am not wrong.
> 
> Especially, a echo 3 > /proc/sys/vm/drop_caches
> 
> will first drop the page cache and then drop_slab()

Then that's the problem of "echo 3 > /proc/sys/vm/drop_cache" itself. It invokes other shrinkers as well (if considered an issue), need to be tweaked in the mm.

Best,
Wei