Re: misc/48282: Running ATF tests on 6.1.2 in KVM VPS leaves processes running

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR misc/48282; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: gson%gson.org@localhost (Andreas Gustafsson)
Subject: Re: misc/48282: Running ATF tests on 6.1.2 in KVM VPS leaves processes 
running
Date: Wed, 9 Oct 2013 16:48:51 +0300

 I have now determined the cause of the problem.  It's a race
 condition: nfsd calls daemon() early in its main(), and by the time it
 gets around to registering its RPCs, the test has already proceeded to
 execute mount_nfs, which fails because the RPCs are not yet
 registered.
 
 Other daemons in NetBSD also suffer from the same general problem of
 going into the background before they are ready to provide service.
 Not that the problem is in any way limited to NetBSD; see for example
 this article, which I mostly agree with:
 
    http://welz.org.za/notes/on-starting-daemons.html
 
 It would be good if we could come up with a standard solution to this
 problem rather than solving it separately and differently in each
 daemon.  Once have a concrete proposal, I will post it on
 tech-userlevel.
 -- 
 Andreas Gustafsson, gson%gson.org@localhost