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List:       gfs-cvs
Subject:    [gfs-commit] cvs commit: GFS/src/fs gfs_mount.h
From:       Ken Preslan <kpreslan () sistina ! com>
Date:       2001-03-25 17:51:49
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kpreslan    2001/03/25 11:51:49 CST

  Modified files:
    src/fs               gfs_mount.h 
  Log:
  Added a new mount option:  localcaching
  When you turn this on, GFS assumes that you're running as a local filesystem
  and turns off all the code that invalidated buffers and pages when a glock
  is release.  It also starts doing buffer read ahead instead of
  automatically sleeping on wait_on_buffer() in gfs_dreread().  (Both of these
  things will cause corruption in a multi-host configuration, so be careful.)
  The end result is that when this option is used, "du" and directory tree
  scaning code seems to run at least somewhat faster.  (I haven't had a chance
  to collect real numbers yet.)
  
  This is still experimental code.  If it works out, it will eventually be
  turned on automagically by nolock like localflocks, but that's not happening
  now.  As far as I can tell, this patch doesn't introduce any new problems,
  but it could probably use some more testing.  (But if you don't specify the
  localcaching flag, things are exactly like they were.)
  
  Revision  Changes    Path
  1.8       +1 -0      GFS/src/fs/gfs_mount.h
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