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Re: Unreclaimed swap space upon process termination?

From: Richard Braun
Subject: Re: Unreclaimed swap space upon process termination?
Date: Mon, 28 Nov 2016 16:59:40 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

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

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