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

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Message-ID: <f7c8ca6fc36df6b4a3c005598c434245@admin.virtall.com>
Date:   Tue, 27 Sep 2016 12:49:58 +0900
From:   Tomasz Chmielewski <mangoo@...g.org>
To:     Nikolay Borisov <n.borisov.lkml@...il.com>
Cc:     Mike Galbraith <umgwanakikbuti@...il.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: thousands of kworker processes with 4.7.x and 4.8-rc*

On 2016-09-26 04:07, Nikolay Borisov wrote:

>> Not sure if that's expected behaviour or not.
> 
> 
> Why don't you sample the stacks of some of those kworker processes to
> see if they are all executing a parituclar piece of work. That might
> help you narrow down where they originate from. Cat multiple
> /proc/$kworker-pid/stack files and see if a pattern emerges.

FYI, it was reproduced and bisected here (scroll to the bottom):

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1626564


Tomasz Chmielewski
https://lxadm.com