Upper limit on make -j ?

Frank Shute frank at esperance-linux.co.uk
Tue Nov 27 14:36:00 PST 2007

On Tue, Nov 27, 2007 at 08:02:44PM +0100, Kris Kennaway wrote:
> Andy Greenwood wrote:
> >Aryeh Friedman wrote:
> >>Before I file a PR I just want to know if it is worth it to file a PR 
> >>for:
> >>
> >>make -j1000 buildworld buildkernel installkernel
> >>seg faulting
> >>  
> >
> >I thought that the kernel builds couldn't be built using parallel jobs, 
> >that it might break something. Is that not true?
> Not true for many years.

>From /usr/src/UPDATING:

        "Avoid using make -j when upgrading.  From time to time in the
        past there have been problems using -j with buildworld and/or
        installworld.  This is especially true when upgrading between
        "distant" versions (eg one that cross a major release boundary
        or several minor releases, or when several months have passed
        on the -current branch)"

Should this be changed then?



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