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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 12 Aug 2010 08:36:23 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/kern vfs_bio.c vfs_subr.c
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kib         2010-08-12 08:36:23 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             vfs_bio.c vfs_subr.c 
  Log:
  SVN rev 211213 on 2010-08-12 08:36:23Z by kib
  
  The buffers b_vflags field is not always properly protected by
  bufobj lock. If b_bufobj is not NULL, then bufobj lock should be
  held when manipulating the flags. Not doing this sometimes leaves
  BV_BKGRDINPROG to be erronously set, causing softdep' getdirtybuf() to
  stuck indefinitely in "getbuf" sleep, waiting for background write to
  finish which is not actually performed.
  
  Add BO_LOCK() in the cases where it was missed.
  
  In collaboration with:  pho
  Tested by:      bz
  Reviewed by:    jeff
  MFC after:      1 month
  
  Revision  Changes    Path
  1.594     +49 -4     src/sys/kern/vfs_bio.c
  1.789     +10 -0     src/sys/kern/vfs_subr.c