[SOLVED] pmg-smtp-filter[19469]: WARNING: Use of uninitialized value $spages

[emanuelserpa]

I keep receiving this error in my syslog:


pmg-smtp-filter[19469]: WARNING: Use of uninitialized value $spages in int at /usr/share/perl5/PVE/ProcFSTools.pm line 253.

What is/are the reason/reasons for this error? How to fix it?

Thanks for the help.

 

[tom]

Please add your detailed version - if you have not current, update:

> pmgversion -v

 

[emanuelserpa]

Oh, I'm sorry, I forgot.

Here's the output:

root@gateway:~# pmgversion -v
Use of uninitialized value $spages in int at /usr/share/perl5/PVE/ProcFSTools.pm line 253.
Use of uninitialized value $spages in int at /usr/share/perl5/PVE/ProcFSTools.pm line 253.
Use of uninitialized value $spages in int at /usr/share/perl5/PVE/ProcFSTools.pm line 253.
Use of uninitialized value $spages in int at /usr/share/perl5/PVE/ProcFSTools.pm line 253.
proxmox-mailgateway-container: 6.2-1 (API: 6.2-3/dd58a339, running kernel: 4.19.0-8-cloud-amd64)
pmg-api: 6.2-3
pmg-gui: 2.2-1
clamav-daemon: 0.102.2+dfsg-1~pmg1
libarchive-perl: 3.3.3-1
libjs-extjs: 6.0.1-10
libjs-framework7: 4.4.7-1
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.0-19
libpve-http-server-perl: 3.0-5
libxdgmime-perl: 0.01-5
lvm2: 2.03.02-3
pmg-docs: 6.2-1
pmg-log-tracker: 2.1.4-1
postgresql-11: 11.7-0+deb10u1
proxmox-mini-journalreader: 1.1-1
proxmox-spamassassin: 3.4.4-2
proxmox-widget-toolkit: 2.1-6
pve-xtermjs: 4.3.0-1

 

[Stoiko Ivanov]

Where have you deployed the PMG? - the running kernel (4.19.0-8) does not look like either a debian stock kernel nor a proxmox provided kernel?

the code causing the warning message has been in our repositories since 2013 - so I guess something changed somewhere else (my guess on your host)

what's the output of:
`cat /sys/kernel/mm/ksm/pages_sharing`
?

 

[emanuelserpa]

It's not a debian stock kernel, I think.

I'm using a openstack based instance on OVH, but it's debian 10 -- the version seems correct, anyway.

The output:

debian@gateway:~$ cat /sys/kernel/mm/ksm/pages_sharing

cat: /sys/kernel/mm/ksm/pages_sharing: No such file or directory

PS: the kernel is avaliable on the official Debian repositories:

https://packages.debian.org/buster/linux-image-4.19.0-6-cloud-amd64

 

[Stoiko Ivanov]

hmm - maybe KSM is disabled in the openstack kernel
could you check the running kernel's config:

zgrep -i ksm /proc/config.gz
grep -i ksm /boot/config
grep -i ksm /boot/config-$(uname -r)

(kernel config locations from https://superuser.com/questions/287371/obtain-kernel-config-from-currently-running-linux-system)

Thanks!

 

[emanuelserpa]

yeah, looks like KSM is disabled

root@gateway:/home/debian# zgrep -i ksm /proc/config.gz
gzip: /proc/config.gz: No such file or directory

root@gateway:/home/debian# grep -i ksm /boot/config
grep: /boot/config: No such file or directory

root@gateway:/home/debian# grep -i ksm /boot/config-$(uname -r)
# CONFIG_KSM is not set

PS.: Found a relevant bug
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955366

Thanks!

 

[Stoiko Ivanov]

thanks for verifying this - I'll send a patch for discussion shortly.

come to think about it - is the openstack instance a KVM base virtual machine or a container?
i.e. could you install a kernel of your choice?
in that case you could install the proxmox-mailgateway metapackage, which pulls in the pve-kernel (where KSM is enabled)
(this is more out of curiosity)

 

[Stoiko Ivanov]

patch got applied - the issue should be gone with libpve-common-perl >= 6.0-21
https://pve.proxmox.com/pipermail/pve-devel/2020-May/043386.html
(or an updated kernel with KSM enabled)

Thanks for the report!