Hi, 
   Questions as I was hacking the nfs and uvm code..
This file gets included in nfs/nfs_vnops.c (more in
uvm).. "opt_uvmhist.h".. 

(i)  What is the significance of this file?
(ii) Where is it declared/defined in the src code? The
only point I found that might be relevant is
     conf/files:165:defflag  opt_uvmhist.h

BTW: What is the defflag?

Thanks for all your help in advance,

Cheers,
NG

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