Bug#800521: systemd: sys-kernel-config.mount not functional

[Michael Biebl]

Am 30.09.2015 um 16:04 schrieb Ferenc Wagner:
> Michael Biebl <biebl at debian.org> writes:
> 
>> Why are your using a .service file to load the dlm module?
> 
> Sorry for being confusing by eliding too much.  The dlm service starts
> the DLM control daemon, and also loads the dlm kernel module beforehand.
> It's dlm_controld which needs a mounted configfs (and the dlm module):
> 
> $ systemctl cat dlm
> # /lib/systemd/system/dlm.service
> [Unit]
> Description=dlm control daemon
> Requires=corosync.service sys-kernel-config.mount
> After=corosync.service sys-kernel-config.mount
> 
> [Service]
> OOMScoreAdjust=-1000
> Type=notify
> NotifyAccess=main
> EnvironmentFile=/etc/default/dlm
> ExecStartPre=/sbin/modprobe dlm 
> ExecStart=/usr/sbin/dlm_controld --foreground $DLM_CONTROLD_OPTS
> #ExecStopPost=/sbin/modprobe -r dlm
> 
> # If dlm_controld doesn't stop, there are active lockspaces.
> # Killing it will just get the node fenced.
> SendSIGKILL=no
> 
> [Install]
> WantedBy=multi-user.target
> 
>> Why does the dlm.service require the sys-kernel-config fs?
> 
> Because dlm_controld uses files under /sys/kernel/config/dlm.
> 
>> Can't you just ship a snippet in /usr/lib/modules-load.d/ and then also
>> include configfs in there?
> 
> No, loading the dlm kernel module is only part of the task.

Sure, but why don't you load the dlm + configfs module not via a
module-load.d snippet, knowing that the Debian kernel doesn't have it
builtin?

>> Fwiw, I don't think there is anything to fix on the systemd side.
> 
> Do you mean that sys-kernel-config.mount somehow manages to work for you
> under jessie?  Then my initial analysis must be incorrect somewhere.


See the upstream bug report you referenced:
Either the module should be compiled in, or software requiring it should
make sure to load the module itself, ideally by shipping a
modules-load.d snippet.

-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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