On Mon, Nov 28, 2016 at 04:03:44PM +0100, Thomas Schwinge wrote: > Unless this a known issue, or somebody can quickly pinpoint the problem, > I'll try to bisect core system packages, between the version of the > "good" and "bad" disk images.
It's a known issue, a side effect of the page cache changes that I merged some months ago. Because of increased cache usage, there is more memory pressure, and therefore more swap usage (mostly through double paging, since the kernel always tries to evict external pages first). The default pager has never been able to correctly reclaim these pages in the past, but now there are a lot more of them. -- Richard Braun