MAX_ARG_PAGES has no effect?

[Nick Matteo]

The other day I was running a grep on a big directory tree and got a 
"Argument list too long" error.  Since I'd like to have this work 
without messing with find and xargs each time, I went into 
include/linux/binfmts.h and changed

#define MAX_ARG_PAGES 32

to

#define MAX_ARG_PAGES 64

I recompiled and installed the kernel, but there's no change (getconf 
ARG_MAX still gives 131072.)  What am I missing?

I am running 2.6.13 on amd64.

Thanks,
Nick Matteo
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