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* Use a tmpfs for /var/run/nscd to ensure that / or /var can be

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unmounted or at least remounted read-only during shutdown.  Upstart
  0.6 apparently uses nscd to do some name lookups, resulting in it
  holding some mmap mappings to deleted files in /var/run/nscd.
  E.g. lsof shows:

    init         1 root  DEL       REG              253,0          1850313 /var/run/nscd/dbyn3Piz
    init         1 root  DEL       REG              253,0          1850312 /var/run/nscd/dbt2e8PH

  See also http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=324900.
  This is a workaround - it would be better if Upstart didn't do this.

svn path=/nixos/branches/upstart-0.6/; revision=18258
This commit is contained in:
Eelco Dolstra 2009-11-07 15:29:46 +00:00
parent 2353e53c5f
commit 9bf8801dc6
1 changed files with 8 additions and 0 deletions
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8
modules/system/activation/activation-script.nix
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@ -84,6 +84,14 @@ let
mkdir -m 0755 -p /var/run/nix/current-load # for distributed builds
mkdir -m 0700 -p /var/run/nix/remote-stores
# Use a tmpfs for /var/run/nscd to ensure that / or /var can be
# unmounted or at least remounted read-only during shutdown.
# (Upstart 0.6 apparently uses nscd to do some name lookups,
# resulting in it holding some mmap mapping to deleted files in
# /var/run/nscd.)
mkdir -p /var/run/nscd
${pkgs.utillinux}/bin/mount -t tmpfs -o "mode=755" none /var/run/nscd
mkdir -m 0755 -p /var/log
touch /var/log/wtmp # must exist