Linked by David Adams on Mon 29th Sep 2008 02:58 UTC, submitted by AdamW
Mandriva has done quite a lot of work on optimizing boot speed for its latest release, Mandriva Linux 2009. Frederic Crozat (head of the French engineering team) has written a blog post summarizing Mandriva's past work on this front, and the tweaks and improvements made for 2009. It shows that close analysis of inefficiencies in boot, and fixing 'small' bugs, can result in gains as large or larger than 'big picture' items like new initialization systems.
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2005-07-06
Rahul: nothing discussed in Fred's blog is about creating an init system, it's about improving efficiency within an existing one.
Mandriva uses prcsys, which is mentioned in Fred's post. It's a very light parallel initialization system which is 100% compatible with SysV. All that's required for it to work is service dependency information embedded in the comments at the start of the initscripts themselves - which is actually a freedesktop standard. You can disable prcsys and use a conventional SysV boot by passing a single kernel parameter ('nopinit'). prcsys also transparently handles initscripts which don't have the dependency information added (i.e. completely conventional SysV initscripts).
Also, prcsys was there first. =) We've been using it since January 2006, rather before Ubuntu came up with upstart.