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> SL6.5, pps_ldisc not included in default
joeblow
 Posted: Feb 1 2014, 08:44 PM
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Can someone knowledgable confirm that pps_ldisc has not been included or otherwise backported into the default kernel in the new SL 6.5 ?

PulsePerSecond is used by ntp. pps_ldisc is needed for ldattach to attach Pulse Per Second functionality on a serial ports DCD pin.

# updatedb
# locate -i pps_ldisc

did not return anything

thx
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toracat
 Posted: Feb 1 2014, 09:13 PM
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As you figured out, pps_ldisc is not in the SL/RHEL-6 kernel. If you need this option, you might want to consider using kernel-ml from ELRepo. Its config shows:
CODE

#
# PPS support
#
CONFIG_PPS=m
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
CONFIG_PPS_CLIENT_LDISC=m
CONFIG_PPS_CLIENT_PARPORT=m
CONFIG_PPS_CLIENT_GPIO=m

--------------------
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burakkucat
 Posted: Feb 1 2014, 09:38 PM
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Further to toracat's reply, here are the configuration parameters that are set in the distribution kernel, the kernel-lt and the kernel-ml packages --

CODE

/boot/config-2.6.32-431.3.1.el6.x86_64:CONFIG_PPS=m

/boot/config-3.10.28-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_GPIO=m
/boot/config-3.10.28-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_LDISC=m
/boot/config-3.10.28-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_PARPORT=m
/boot/config-3.10.28-1.el6.elrepo.x86_64:CONFIG_PPS=m

/boot/config-3.13.1-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_GPIO=m
/boot/config-3.13.1-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_LDISC=m
/boot/config-3.13.1-1.el6.elrepo.x86_64:CONFIG_PPS_CLIENT_PARPORT=m
/boot/config-3.13.1-1.el6.elrepo.x86_64:CONFIG_PPS=m

Perhaps testing with kernel-lt would be a more appropriate first step?

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joeblow
 Posted: Feb 2 2014, 01:02 AM
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Thanks for the ElRepo reference and info.

All I really needed right now was a yes/no answer to make sure I wasn't missing something obvious.

Cheers
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