Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64
We're having the same problem here. For some reason, only 2 domUs are
affected (the dom0 has a total of 22 domUs, 14 of those are running
Debian stretch, and 13 of those are running Linux 4.9.51-1).
The `xl console` output of the first domU (according to our monitoring
it hangs since yesterday 14:06):
[ 3746.780086] INFO: task ntpd:670 blocked for more than 120 seconds.
[ 3746.780094] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3746.780097] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3746.780223] INFO: task jbd2/xvdb6-8:8173 blocked for more than 120 seconds.
[ 3746.780228] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3746.780233] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3746.780304] INFO: task rsync:8188 blocked for more than 120 seconds.
[ 3746.780308] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3746.780311] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3867.612083] INFO: task jbd2/xvda1-8:203 blocked for more than 120 seconds.
[ 3867.612091] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3867.612091] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3867.612148] INFO: task ntpd:670 blocked for more than 120 seconds.
[ 3867.612150] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3867.612152] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3867.612238] INFO: task jbd2/xvdb6-8:8173 blocked for more than 120 seconds.
[ 3867.612242] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3867.612245] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3867.612287] INFO: task rsync:8188 blocked for more than 120 seconds.
[ 3867.612291] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3867.612294] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3988.444071] INFO: task jbd2/xvda1-8:203 blocked for more than 120 seconds.
[ 3988.444080] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3988.444084] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3988.444154] INFO: task ntpd:670 blocked for more than 120 seconds.
[ 3988.444159] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3988.444162] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 3988.444266] INFO: task kworker/2:0:1533 blocked for more than 120 seconds.
[ 3988.444271] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 3988.444274] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
The other domU had a similar error message before a coworker downgraded
the kernel to 3.16 get it working again:
INFO: task jbd2/xvda1-8:191 blocked for more than 120 seconds.
[ 605.148107] Not tainted 4.9.0-4-amd64 #1 Debian 4.9.51-1
[ 605.148111] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
The first domU is a backup machine, it mainly uses rsync --link-dest to
pull backups from other machines, and is therefore rather IO intensive.
The other domU is a firewall/router and shouldn't be IO intensive at all.
--
Mit freundlichen Grüßen
Martin v. Wittich
IServ GmbH
Bültenweg 73
38106 Braunschweig
Telefon: 0531-2243666-0
Fax: 0531-2243666-9
E-Mail: info@iserv.eu
Internet: iserv.eu
USt-IdNr. DE265149425 | Amtsgericht Braunschweig | HRB 201822
Geschäftsführer: Benjamin Heindl, Jörg Ludwig
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