From: Tomasz Chmielewski <mangoo@wpkg.org>
To: LKML <linux-kernel@vger.kernel.org>
Subject: thousands of kworker processes with 4.7.x and 4.8-rc*
Date: Mon, 19 Sep 2016 16:08:28 +0900 [thread overview]
Message-ID: <35b2acf87bfeaf1d04f2cf3d10b99b6e@admin.virtall.com> (raw)
On several servers running 4.7.x and 4.8-rc6/7 kernels I'm seeing
thousands of kworker processes.
# ps auxf|grep -c kworker
2104
Load average goes into hundreds on a pretty much idle server (biggest
CPU and RAM consumers are probably SSHD with one user logged in and
rsyslog writing ~1 line per minute):
# uptime
06:58:56 up 26 min, 1 user, load average: 146.11, 215.46, 105.70
# uptime
06:59:48 up 26 min, 1 user, load average: 305.20, 240.84, 120.25
Sometimes seeing lots of them in "D" state:
root 19474 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:208]
root 19475 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:209]
root 19477 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:211]
root 19480 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:214]
root 19483 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:217]
root 19485 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:219]
root 19486 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:220]
root 19487 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:221]
root 19492 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/0:226]
root 19533 0.0 0.0 0 0 ? D 06:54 0:00 \_
[kworker/4:257]
Is it a known issue?
The server has 8 CPUs and 32 GB RAM.
Tomasz Chmielewski
https://lxadm.com
next reply other threads:[~2016-09-19 7:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 7:08 Tomasz Chmielewski [this message]
2016-09-23 13:23 ` thousands of kworker processes with 4.7.x and 4.8-rc* Tomasz Chmielewski
2016-09-23 14:10 ` Mike Galbraith
2016-09-23 16:15 ` Tomasz Chmielewski
[not found] ` <a08b61cee6c43de99ac3c6a8cacfdc04@admin.virtall.com>
2016-09-25 12:40 ` Tomasz Chmielewski
2016-09-25 17:21 ` Mike Galbraith
2016-09-25 18:22 ` Mike Galbraith
2016-09-25 19:07 ` Nikolay Borisov
2016-09-27 3:49 ` Tomasz Chmielewski
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