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From: Kirk McKusick <mckusick@FreeBSD.org>
Date: Wed, 12 Jan 2000 23:17:41 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/contrib/softupdates ffs_softdep.c
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mckusick    2000/01/12 23:17:41 PST

  Modified files:
    sys/contrib/softupdates ffs_softdep.c 
  Log:
  A panic occurs during an fsync when a dirty block associated with
  a vnode has not been written (which would clear certain of its
  dependencies). The problems arises because fsync with MNT_NOWAIT
  no longer pushes all the dirty blocks associated with a vnode. It
  skips those that require rollbacks, since they will just get instantly
  dirty again. Such skipped blocks are marked so that they will not be
  skipped a second time (otherwise circular dependencies would never
  clear). So, we fsync twice to ensure that everything will be written
  at least once.
  
  Revision  Changes    Path
  1.48      +8 -5      src/sys/contrib/softupdates/ffs_softdep.c



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