Re: -current kernel can't be complied for 3 days

On Sat, Jul 23, 2005 at 09:13:49PM +0200, Oliver Lehmann wrote:
> M. Warner Losh wrote:
> 
> > Chances are you are running out of memory.  Can you try the build w/o
> > -jN?  Large values of N can easily run a body out of swap space,
> > yeilding a build failure when the tree is perfectly fine.
> > 
> > Persoanally, I never do a -j larger then 4 or 8.  top shows that the
> > system that I have is giant bound when I do, so why add more people to
> > the list of Giant waiters?
> 
> Hi Warner,
> 
> I don't think that i ran out of memory. At least swapper didn't sayed
> sth. like that. Back in Dec 2001 I even had a -j100 running (for fun) and
> it build successfully. This was on a dual PII 333 with 320MB of memoty
> compiling a 4.XX on a 4.XX.
> Why shouldn't a -j16 on a dual PIII 850 with 640MB of memory compiling a
> 6.0 on a 5.4 doesn't work then? I know there are many differences between
> 4.X and 5.X but why got it worse?
> A -j4 worked btw (at least the one time I tried it)

There is a default limit of 16 simultaneous execs that can be easily
saturated on an SMP system (further execs cause aborts as you are
seeing).  Increase the value of the vm.exec_map_entries tunable.

Kris