Re: thousands of kworker processes with 4.7.x and 4.8-rc*

From: Tomasz Chmielewski
Date: Sun Sep 25 2016 - 08:40:49 EST

On 2016-09-25 18:29, Tomasz Chmielewski wrote:

I'll try to bisect.

OK, not a kernel regression, but some config change caused it.
However, I'm not able to locate which change exactly.

I'm attaching two configs which I've tried with 4.7.3 - one results in
thousands of kworkers, and the other doesn't. Also included a diff
between them.

Any obvious changes I should try?

The problem is the allocator.


With SLUB, I'm getting a handful of kworker processes, as expected.

With SLAB, I'm getting thousands of kworker processes.

Not sure if that's expected behaviour or not.

Tomasz Chmielewski