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Date: Sat, 8 Mar 1997 07:22:17 -0800 (PST)
From: Bruce Evans <bde>
Message-Id: <199703081522.HAA17765@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/kern vfs_cache.c
Sender: owner-cvs-sys@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

bde         97/03/08 07:22:16

  Modified:    sys/kern  vfs_cache.c
  Log:
  Fixed the hash formula.  Lite2 doesn't have phashinit(), so Lite2's hash
  formula uses `& nchash'.  This is very broken when nchash is a prime
  number instead of 1 less than a power of 2, but the Lite2 formula was
  merged in.
  
  Merged some cosmetic changes from Lite2, rev.1.21 and Lite1.  The merge
  was difficult because the Lite2 code is essentially ours (phk's) except
  where Lite2 improved or broke it.
  
  Summary of the Lite2 changes:
  - in the copyright, phk's rights have been transferred to the Regents.
    This change should be reviewed.
  - nchENOENT went away; the "no" vnode is now simply 0.
  - comments were improved.
  - style was "improved".
  - goto instead of Fanatism (sic) was considered bad :-).
  - there are some small changes to support whiteouts.
  - new cache entries are added in more cases.  More work is required
    near here to change the hash table size if kern.desiredvnodes is
    changed using sysctl.
  - rescanning of the hash bucket in cache_purgevfs() was removed.  This
    change should be reviewed.
  
  Revision  Changes    Path
  1.24      +14 -14    src/sys/kern/vfs_cache.c