* bug#26706: mingetty consumes 40% CPU printing the login prompt over and over
@ 2017-04-29 1:11 myglc2
2018-04-05 22:41 ` myglc2
0 siblings, 1 reply; 4+ messages in thread
From: myglc2 @ 2017-04-29 1:11 UTC (permalink / raw)
To: 26706
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I noticed that my headless server running GuixSD was busy when I am not
doing anything. When I looked at top I saw mingetty consuming 40% CPU
...
$ top -o %CPU -n 1 | head -n 25
top - 20:44:13 up 5 days, 12:58, 3 users, load average: 0.33, 0.33, 0.35
Tasks: 192 total, 1 running, 191 sleeping, 0 stopped, 0 zombie
%Cpu0 : 0.0/0.1 0[ ]
%Cpu1 : 0.1/2.9 3[|| ]
%Cpu2 : 0.2/4.0 4[||| ]
%Cpu3 : 0.3/4.9 5[||| ]
%Cpu4 : 0.2/0.1 0[ ]
%Cpu5 : 0.2/4.6 5[||| ]
%Cpu6 : 0.2/4.3 5[||| ]
%Cpu7 : 0.3/4.1 4[||| ]
GiB Mem : 6.5/15.610 [ ]
GiB Swap: 0.0/9.649 [ ]
PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND
384 root 20 0 6.2m 0.3m 40.0 0.0 2386:36 S mingetty
7 root 20 0 0.0m 0.0m 6.7 0.0 2:20.86 S rcu_sched
4154 g1 20 0 300.3m 135.1m 6.7 0.8 3:37.67 S emacs
7431 root 20 0 0.0m 0.0m 6.7 0.0 0:26.07 S kworker/u16:2
7539 root 20 0 0.0m 0.0m 6.7 0.0 0:06.54 S kworker/u16:0
1 root 20 0 130.1m 27.9m 0.0 0.2 0:03.22 S shepherd
If I plug in a console display, I see the login prompt is being rapidly
printed over and over. If I hit the console return key the printing
stops and mingetty stops using CPU.
I am running a relatively recent GuixSD built from git checkout ...
g1@g1 ~$ guix --version
guix (GNU Guix) 0.12.0
g1@g1 ~$ stat ~/.config/guix/latest | grep File:
File: /home/g1/.config/guix/latest -> /home/g1/src/guix/
g1@g1 ~$ git -C ~/.config/guix/latest describe
v0.12.0-3191-g25a49294c
g1@g1 ~$ git -C ~/.config/guix/latest log -n 1 --oneline
25a49294c cache: Work around 'time-monotonic' bug in Guile 2.2.2.
Here is the system config:
[-- Attachment #2: sys.scm --]
[-- Type: application/octet-stream, Size: 1812 bytes --]
;;; GuixSD headless server
(use-modules (gnu))
(use-service-modules networking ssh)
(use-package-modules
base disk admin linux qemu screen
ssh certs xorg cups
freeipmi rsync wget version-control)
(operating-system
(host-name "g1")
(timezone "America/New_York")
(locale "en_US.utf8")
(kernel-arguments '("console=ttyS1,115200"))
;; RAID1 root using 1 NVMe SSD + 2 HDs
(bootloader (grub-configuration (device "/dev/nvme0n1")))
(initrd (lambda (file-systems . rest) (apply base-initrd file-systems
#:extra-modules '("raid1")
rest)))
(mapped-devices (list (mapped-device
(source '("/dev/nvme0n1p1" "/dev/sda1" "/dev/sdb1"))
(target "/dev/md3")
(type raid-device-mapping))))
(file-systems (cons (file-system
(title 'device)
(device "/dev/md3")
(mount-point "/")
(type "ext4")
(dependencies mapped-devices))
%base-file-systems))
(swap-devices '("/dev/nvme0n1p2" ))
(users (cons* (user-account (name "g1")
(group "users")
(supplementary-groups '("wheel" "kvm"))
(home-directory (string-append "/home/" name)))
(user-account (name "admin")
(group "users")
(supplementary-groups '("wheel" "kvm"))
(home-directory (string-append "/home/" name)))
%base-user-accounts))
(packages (cons*
cups
freeipmi
git
glibc-utf8-locales
gnu-make
mdadm
nss-certs
openssh
parted
qemu
rsync
screen
smartmontools
wget
xauth
%base-packages))
(services (cons* (dhcp-client-service)
(ntp-service)
(service openssh-service-type (openssh-configuration
(x11-forwarding? #t)))
(agetty-service (agetty-configuration (tty "ttyS1")
(baud-rate "115200")))
%base-services)))
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#26706: mingetty consumes 40% CPU printing the login prompt over and over
2017-04-29 1:11 bug#26706: mingetty consumes 40% CPU printing the login prompt over and over myglc2
@ 2018-04-05 22:41 ` myglc2
2018-04-06 8:06 ` Ludovic Courtès
2018-04-06 9:07 ` Chris Marusich
0 siblings, 2 replies; 4+ messages in thread
From: myglc2 @ 2018-04-05 22:41 UTC (permalink / raw)
To: 26706
As of guix (GNU Guix) 0.14.0.4032-cfb55 I can't reproduce this, and
haven't seen it since ~ when first reported, so I suggest it be
closed. TIA - George
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#26706: mingetty consumes 40% CPU printing the login prompt over and over
2018-04-05 22:41 ` myglc2
@ 2018-04-06 8:06 ` Ludovic Courtès
2018-04-06 9:07 ` Chris Marusich
1 sibling, 0 replies; 4+ messages in thread
From: Ludovic Courtès @ 2018-04-06 8:06 UTC (permalink / raw)
To: myglc2; +Cc: 26706-done
myglc2@gmail.com skribis:
> As of guix (GNU Guix) 0.14.0.4032-cfb55 I can't reproduce this, and
> haven't seen it since ~ when first reported, so I suggest it be
> closed. TIA - George
Great, thanks for the update.
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#26706: mingetty consumes 40% CPU printing the login prompt over and over
2018-04-05 22:41 ` myglc2
2018-04-06 8:06 ` Ludovic Courtès
@ 2018-04-06 9:07 ` Chris Marusich
1 sibling, 0 replies; 4+ messages in thread
From: Chris Marusich @ 2018-04-06 9:07 UTC (permalink / raw)
To: myglc2; +Cc: 26706-done
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myglc2@gmail.com writes:
> As of guix (GNU Guix) 0.14.0.4032-cfb55 I can't reproduce this, and
> haven't seen it since ~ when first reported, so I suggest it be
> closed. TIA - George
I'll close it now, then.
--
Chris
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^ permalink raw reply [flat|nested] 4+ messages in thread
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2017-04-29 1:11 bug#26706: mingetty consumes 40% CPU printing the login prompt over and over myglc2
2018-04-05 22:41 ` myglc2
2018-04-06 8:06 ` Ludovic Courtès
2018-04-06 9:07 ` Chris Marusich
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