RFC w.r.t. toggling debugging on/off for mountd via a signal

From: Rick Macklem <rmacklem_at_uoguelph.ca>
Date: Sun, 19 May 2019 01:58:44 +0000

I've been working with Peter Errikson on a patch for mountd that adds a new option
for incremental updating of exports. This seems to be helping a lot w.r.t. performance
on an NFS server with lots (10000+) of exported file systems.

I have debug syslog() calls in the code, which I/Peter think would be worth keeping
in the production code in case someone runs into problems with this new option.

As such, I'd like to have the code compiled in by default (not only if DEBUG is defined,
as mountd.c has now). I also was thinking it would be nice if the daemon didn't need
to be restarted to enable/disable the debugging output, since that breaks NFS
mounting during the restart.

So, I was thinking of having the debugging output toggled on/off via SIGUSR1.

What do you think of this idea?
Any other/better ways to do this?
Also, would LOG_DAEMON and LOG_DEBUG sound like the correct facility and
priority for theses syslog() calls?

Thanks in advance for any comments, rick
Received on Sat May 18 2019 - 23:58:52 UTC

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