From owner-cvs-all  Tue Jan  9 21: 6:57 2001
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From: Greg Lehey <grog@FreeBSD.org>
Date: Tue, 9 Jan 2001 21:06:38 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/dev/vinum vinumlock.c
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grog        2001/01/09 21:06:38 PST

  Modified files:
    sys/dev/vinum        vinumlock.c 
  Log:
  Remove obsolete functions [un]lockplex and [un]lockvol.
  
  Rewrite lockrange and unlockrange.  The lock table is now a fixed
  size, so there is no possibility for race conditions when expanding.
  The current size (256 locked ranges) should be large enough that it
  makes no sense to expand it.  To do expansion right would require
  quiescing the plex (requiring at least 256 I/O completions), and the
  performance implications are horrendous.
  
  Add a mutex per plex for accessing the lock table.
  
  Based on analysis by:	tegge
  
  Revision  Changes    Path
  1.20      +62 -137   src/sys/dev/vinum/vinumlock.c



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