[squid-dev] SMP scaling in no_daemon mode?

[Andreas Weigel]

Revised patch:

Fix option --foreground to implement expectable behavior and allow usage 
of SMP mode with service supervisors that do not work well with daemons.

Currently, --foreground behavior is counter-intuitive in that the launched
process, while staying in the foreground, forks another "master" process,
which will create additional children (Kids), depending on the number of
configured workers/diskers.

Furthermore, sending a SIGINT/SIGTERM signal to this foreground process
terminates it, but leaves all the children running.

The behavior got introduces with revno 14561.

 From discussion on squid-dev, the following behavior is implemented by 
this patch:

* -N: The initial process is a master and a worker process.
   No kids.
   No daemonimization.

* --foreground: The initial process is the master process.
   One or more worker kids (depending on workers=N).
   No daemonimization.

* neither: The initial process double-forks the master process.
   One or more worker kids (depending on workers=N).
   Daemonimization.

The Release Notes for v4 were updated to reflect the corrected behavior.

Kind Regards,
Andreas

-- 
Mit freundlichem Gruß / Best regards,

Andreas Weigel
UTM Backend Developer

Securepoint GmbH
Salzstrasse 1
D-21335 Lüneburg

https://www.securepoint.de

Tel.: +49(0)413124010
Fax: +49(0)4131240118

Geschäftsführer: Lutz Hausmann, Claudia Hausmann
Amtsgericht Lüneburg HRB 1776
USt.-ID-Nr.: DE 188 528 597

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