Date: Sun, 14 Sep 2014 09:58:40 +0200 (CEST) From: Christian Kratzer <ck-lists@cksoft.de> To: freebsd-virtualization@freebsd.org Subject: KVM virsh console lockups with FreeBSD 10 Message-ID: <alpine.BSF.2.00.1409140942450.21104@pohjola.cksoft.de>
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Hi,
I have several FreeBSD 10-RELEASE amd64 VMs running on KVM under CentOS 6.5.
I use the KVM serial console with "virsh console" for out of band access to those VMs and can reproduce lockups of the console when pasting stuff into them.
I have following in the VM:
ck@TEST:~ % uname -a
FreeBSD webmail2.cksoft.de 10.0-RELEASE-p7 FreeBSD 10.0-RELEASE-p7 #0: Tue Jul 8 06:37:44 UTC 2014 root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
ck@TEST:~ % freebsd-version
10.0-RELEASE-p8
ck@TEST:~ % cat /boot/loader.conf
comconsole_speed="115200" # Set the current serial console speed
console="comconsole" # A comma separated list of console(s)
ck@TEST:~ % grep ttyu0 /etc/ttys
ttyu0 "/usr/libexec/getty std.115200" dialup on secure
ck@TEST:~ %
and following in the KVM configuration file:
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
I can happily type in the console and dump large file to the console without any problems.
But as soon I paste some text into the console it locks up and requires a reboot of the VM to come back to life.
I cannot see anything strange in ps when I check the hung connection:
ck@TEST:~ % ps xawel | grep u0
0 924 1 0 20 0 47660 2732 wait Is u0 0:00.02 login [pam] (login)
0 942 924 0 20 0 23496 3512 pause I u0 0:00.03 -csh (csh)
0 945 942 0 20 0 23372 3432 ttyin I+ u0 0:00.01 vi
ck@TEST:~ %
In above example the console hung after a couple of characters pasted into vi.
Any ideas on how to debug this ?
Greetings
Christian
--
Christian Kratzer CK Software GmbH
Email: ck@cksoft.de Wildberger Weg 24/2
Phone: +49 7032 893 997 - 0 D-71126 Gaeufelden
Fax: +49 7032 893 997 - 9 HRB 245288, Amtsgericht Stuttgart
Mobile: +49 171 1947 843 Geschaeftsfuehrer: Christian Kratzer
Web: http://www.cksoft.de/
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