https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232800
--- Comment #2 from teksim...@gmail.com ---
(In reply to Mark Millard from comment #1)
Thank you for your feedback. I've added vm.pageout_oom_seq=120 to sysctl.conf.
Both of the following messages have been logged;
Oct 30 23:08:20 host kernel: swap_pager: indefinite wait buffer: bufobj: 0,
blkno: 1143, size: 16384
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
477,size 69632, error 12
swap is filebacked;
[user@host /var/log]$ cat /etc/fstab
# Device Mountpoint FStype Options Dump Pass#
...
md99 none swap sw,late,file=/usr/swap0 0 0
the swap file is in /usr which is the same fs as / (it was provisioned this way
by the cloud provider.) I can roll back the vm to a 10.4 snapshot. I'm
confident the issue wouldnt be present. The 10.4 install has been solid, and
this began /immediately/ after the upgrade.
Reboot 1
[user@host /var/log]$ sudo less all.log
...
Oct 30 23:05:58 host kernel: Starting jails:
Oct 30 23:08:20 host kernel:
Oct 30 23:08:20 host kernel: swap_pager: indefinite wait buffer: bufobj: 0,
blkno: 1143, size: 16384
Oct 30 23:08:20 host last message repeated 2 times
Oct 30 23:08:20 host kernel: pid 2532 (mysqld), uid 88, was killed: out of swap
space
Oct 30 23:08:20 host kernel: swap_pager: indefinite wait buffer: bufobj: 0,
blkno: 1143, size: 16384
Oct 30 23:08:20 host last message repeated 2 times
Oct 30 23:08:20 host kernel: pid 791 (ntpd), uid 0, was killed: out of swap
space
Oct 30 23:08:20 host kernel: Oct 30 23:08:20 host kernel: pid 2532 (mysqld),
uid 88, was killed: out of swap space
Oct 30 23:08:20 host kernel: Oct 30 23:08:20 host kernel: pid 791 (ntpd), uid
0, was killed: out of swap space
...
[user@host /var/log]$ uname -a
FreeBSD host.domain.com 11.2-RELEASE-p4 FreeBSD 11.2-RELEASE-p4 #0: Thu Sep 27
08:16:24 UTC 2018
r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
[user@host /var/log]$ swapinfo
Device 1K-blocks Used Avail Capacity
/dev/md99 524288 5296 518992 1%
[user@host /var/log]$ uptime
11:13PM up 8 mins, 2 users, load averages: 0.06, 0.11, 0.08
[user@host /var/log]$ sudo service ntpd start
Starting ntpd.
[user@host /var/log]$ sudo jail -c sql
sql: created
[user@host /var/log]$ swapinfo
Device 1K-blocks Used Avail Capacity
/dev/md99 524288 59912 464376 11%
[user@host /var/log]$ jls
JID IP Address Hostname Path
2 127.0.0.253 php.domain.com /usr/local/jails/php
3 127.0.0.254 www.domain.com /usr/local/jails/www
4 127.0.0.252 sql.domain.com /usr/local/jails/sql
Reboot 2
[user@host /var/log]$ sudo less all.log
Oct 30 23:16:50 host kernel: Starting jails:
Oct 30 23:16:52 host kernel:
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
445,size 131072, error 12
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
477,size 69632, error 12
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
494,size 8192, error 12
...
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
946,size 69632, error 12
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
963,size 36864, error 12
Oct 30 23:16:52 host kernel: swap_pager: I/O error - pageout failed; blkno
972,size 12288, error 12
Oct 30 23:18:12 host kernel: pid 2532 (mysqld), uid 88, was killed: out of swap
space
Oct 30 23:18:12 host kernel: Oct 30 23:18:12 host kernel: pid 2532 (mysqld),
uid 88, was killed: out of swap space
[user@host ~]$ uptime
11:18PM up 2 mins, 1 user, load averages: 0.23, 0.25, 0.11
[user@host ~]$ jls
JID IP Address Hostname Path
2 127.0.0.253 php.domain.com /usr/local/jails/php
3 127.0.0.254 www.domain.com /usr/local/jails/www
[user@host ~]$ swapinfo
Device 1K-blocks Used Avail Capacity
/dev/md99 524288 5752 518536 1%
[user@host ~]$ sudo jail -c sql
sql: created
[user@host ~]$ swapinfo
Device 1K-blocks Used Avail Capacity
/dev/md99 524288 54272 470016 10%
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