Arne Wörner arne_woerner at
Wed Nov 23 09:11:56 PST 2005

--- Michael Conlen <m at> wrote:
> I'm trying to tune the system to allow very large
> mmap()'s in a 
I had a similar problem with shared memory.

I found an option in /sys/conf/NOTES.

I think it could help in your case, if u increase 
% options  MAXDSIZ=(1024UL*1024*1024)
% options  MAXSSIZ=(128UL*1024*1024)
% options  DFLDSIZ=(1024UL*1024*1024)

E. g. in your /sys/<arch>/conf/<kernel name>
options MAXDSIZ=(2000UL*1024*1024)

But I dont know, if that is a good idea... Maybe you should use
nextboot(8) in case your box does not like the new kernel... :-)


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