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To: Don Lewis <Don.Lewis@tsc.tdk.com>
cc: fs@freebsd.org
Subject: Re: the namei cache... 
In-reply-to: Your message of "Thu, 24 Apr 1997 16:56:18 PDT."
             <199704242356.QAA12777@salsa.gv.tsc.tdk.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Thu, 24 Apr 1997 17:03:00 -0700
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>On Apr 24,  8:24pm, Narvi wrote:
>} Subject: Re: the namei cache...
>}  
>} How about not adding byte values but say, long values? We may have to keep
>} upto 3 bytes of additional space (avoiding overuns) but get it done in
>} about 1/4th of the additions.
>
>The additions are pretty cheap.  The problem with adding bigger chunks is
>that the names aren't word aligned, so for each set of 4 bytes, you have
>to read two words, extract the desired bytes, and concatenate the results.

   Actually, you could read/add in 16bit words since the component name is
null terminated...or if the trailing space is zeroed up to a longword
boundry, you could add in longwords.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project