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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 12 Sep 2007 16:31:33 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
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Cc: 
Subject: cvs commit: src/sys/sys mount.h src/sys/kern vfs_mount.c vfs_subr.c
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kib         2007-09-12 16:31:33 UTC

  FreeBSD src repository

  Modified files:
    sys/sys              mount.h 
    sys/kern             vfs_mount.c vfs_subr.c 
  Log:
  When restoring the mount after umount failed, the MNTK_UNMOUNT flag
  prevents insmntque() from placing reallocated syncer vnode on mount
  list, that causes panic in vfs_allocate_syncvnode().
  
  Introduce MNTK_NOINSMNTQ flag, that marks the period when instmntque is
  not allowed to success, instead of MNTK_UNMOUNT. The MNTK_NOINSMNTQ is
  set and cleared simultaneously with MNTK_UNMOUNT, except on umount error
  path, where it is cleaned just before the syncer vnode is going to be
  allocated.
  
  Reported by:    Peter Jeremy <peterjeremy optushome com au>
  Suggested by:   tegge
  Approved by:    re (rwatson)
  
  Revision  Changes    Path
  1.265     +9 -4      src/sys/kern/vfs_mount.c
  1.707     +1 -1      src/sys/kern/vfs_subr.c
  1.228     +5 -0      src/sys/sys/mount.h