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

From: Wang, Wei W
Date: Thu Feb 06 2020 - 04:44:22 EST


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