[Bug 203129] syslogd: /dev/console: Interrupted system call on arm64

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203129

Richard Russo <freebsd at ruka.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |freebsd at ruka.org

--- Comment #7 from Richard Russo <freebsd at ruka.org> ---
This seems to be related to a possibly inadvertent change I noticed on our
11.1-RELEASE (p1) hosts: the serial console device can now have its baud rate
and modem control settings changed other than at boot. On 10.3 and below, modem
control was prohibited for serial console, and baud rate was fixed at boot.

We had /etc/ttys configured to do "/usr/libexec/getty std.9600", but the serial
console is actually set for 115200, with no modem control. On 10.3 and earlier,
the getty config was ignored, but on 11.1, the config is used, and since our
console connection (also Supermicro IPMI SOL) isn't doing modem control (or not
properly), this made output to the serial console block -- which was causing
segfaulting processes to never exit.

This seems to be resolvable, by setting /etc/ttys to the proper settings
(3wire.115200 in our case), but I didn't see a kernel change that looked like
it was intentionally changing this, and sys/kern/tty.c:323 still seems to be
trying to prevent modem control on the console port.

-- 
You are receiving this mail because:
You are the assignee for the bug.