Re: speed difference between using hard-linked and modular drives?

[David S. Miller]

   From: Andrew Morton <[e-mail]>
   Date: Thu, 08 Nov 2001 23:16:08 -0800
   
   Well on my setup, there are more hash buckets than there are
   pages in the system.  So - basically empty.  If memory serves
   me, never more than two pages in a bucket.

Ok, this is what I expected.  The function is tuned for
having N_HASH_CHAINS being roughly equal to N_PAGES.

If you want to experiment with smaller hash tables, there
are some hacks in the FreeBSD sources that choose a different "salt"
per inode.  You xor the salt into the hash for each page on that
inode.  Something like this...

Franks a lot,
David S. Miller
[e-mail]