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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 13 Sep 2010 20:29:09 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/sys/kern vfs_bio.c vfs_subr.c
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kib         2010-09-13 20:29:09 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    sys/kern             vfs_bio.c vfs_subr.c 
  Log:
  SVN rev 212583 on 2010-09-13 20:29:09Z by kib
  
  MFC r211213:
  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.
  
  Revision    Changes    Path
  1.568.2.6   +49 -4     src/sys/kern/vfs_bio.c
  1.767.2.13  +10 -0     src/sys/kern/vfs_subr.c