tree b6db4a0a0c1aa9c261e4adaeb4dcae5ed7ff4350
parent 8103b5cc6216d461047514d188248bd14873624a
author Christian Thaeter <ct@pipapo.org> 1248548115 +0200
committer Jiri Kosina <jkosina@suse.cz> 1253538897 +0200

trivial: doc: hpfall: reduce risk that hpfall can do harm

Improve the example code to be at least useable, as in not causing
harm (as shown below). Code can still be improved further, but this
adds some basic safeguards.

1. hpfall *MUST* mlockall(MCL_CURRENT|MCL_FUTURE); itself!
Since the Program sits and waits most of the time it becomes very likely
swapped out. If it gets woken up when the laptop drops from the table
while it is swapped out it actually triggers harddrive activity!

2. Daemonize hpfall using 'daemon(0,0)' (quick and dirty).

3. Give hpfall realtime priority.
Should give a chance that it has less latency when woken up.

Signed-off-by: Christian Thaeter <ct@pipapo.org>
Signed-off-by: Frans Pop <elendil@planet.nl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>