then every unshare(CLONE_NEWNS) system call causes a new entry to be
created in /dev/cgroup/<pid>, which is not removed automatically.
This can cause subsequent calls to unshare() to fail if the PID has
wrapped around. Worse, a large number of entries in /dev/cgroup
causes a very substantial system slowdown: doing 10,000
fork()/unshare(CLONE_NEWNS)/exit() calls took 21s without the "ns"
subsystem, but 2m43s with it, and the system slows down permanently
until the entries in /dev/cgroup are removed (going to a load of > 6
on my laptop).
This is particularly important for Nix because its chroot feature
uses unshare(CLONE_NEWNS). (http://yellowgrass.org/issue/Nix/219)
svn path=/nixos/trunk/; revision=27216
in /etc/xen/auto at boot time, to save all running domains during
shutdown, and to restore all saved domains at boot time.
svn path=/nixos/trunk/; revision=24121
init script. This removes the need for the `systemConfig' boot
parameter; `init=<stage-2-init>' is enough. However, the GRUB menu
builder still needs to add `systemConfig' to the kernel command line
for compatibility with old configurations.
svn path=/nixos/trunk/; revision=23775
* Moved some scriptlets to the appropriate modules.
* Put the scriptlet that sets the default path at the start, since it
never makes sense not to have it there. It no longer needs to be
declared as a dependency.
* If a scriptlet has no dependencies, it can be denoted as a plain
string (i.e., `noDepEntry' is not needed anymore).
svn path=/nixos/trunk/; revision=23762
like `build-vm', but boots using the regular boot loader (i.e. GRUB
1 or 2) rather than booting directly from the kernel/initrd. Thus
it allows testing of GRUB.
svn path=/nixos/trunk/; revision=23747
build hook uses this directory to store temporary GC roots. (It
creates it if it doesn't exist, but it's better to do it here as
well to ensure the right ownership and permissions.)
* Clear /nix/var/nix/gcroots/tmp and /nix/var/nix/temproots at boot
time.
svn path=/nixos/trunk/; revision=23417
we want to generate the GRUB menu without actually installing GRUB
(because Amazon supplies its own pv-grub), and each menu entry
requires "root (hd0)". For the first, allow boot.loader.grub.device
to be set to "nodev" to indicate that the GRUB menu should be
generated without installing GRUB. For the second, add an option
boot.loader.grub.extraPerEntryConfig to allow commands to be added
to each GRUB menu entry (in this case, "root (hd0)").
svn path=/nixos/trunk/; revision=22712
screws up the X server (CPU usage goes to 100%, switching virtual
consoles no longer works, etc.). TODO: we need some generic way to
mark jobs that shouldn't be started automatically.
svn path=/nixos/trunk/; revision=22608
shutdown. (Portmap and statd are needed during shutdown to unmount
NFS volumes but have open files in /var/run.)
* In the shutdown job, don't kill PIDs belonging to Upstart jobs that
are still running. If they don't stop on the "starting shutdown"
event, then they're needed during shutdown (such as portmap and
statd).
* NFS test: test whether the shutdown quickly unmounts NFS volumes
(i.e. whether portmap and statd are still running).
svn path=/nixos/branches/boot-order/; revision=22204
`su'.
* The `usermod' from `shadow' allows setting a supplementary group
equal to the user's primary group, so the special hack for the
`nixbld' group is no longer needed.
* Removed /etc/default/passwd since it's not used by the new passwd.
The hash is configured in pam_unix.
* Move some values for `security.setuidPrograms' and
`security.pam.services' to the appropriate modules.
svn path=/nixos/trunk/; revision=22107
the current configuration don't match the running kernel. This
ensures that modprobe still works after a "nixos-rebuild switch" to
a configuration that has a different kernel version.
svn path=/nixos/trunk/; revision=19696
GRUB version changes. (That's the complete version from the name
attribute, not the boot.loader.grub.version attribute.) The current
version is recorded in /boot/grub/version. This is required to
prevent massive breakage when we change the default value of
boot.loader.grub.version to "2".
svn path=/nixos/trunk/; revision=18997
qemu_kvm. Installation doesn't take place yet. VM is started
printing a remote controlled "Hello".
This serves as example how to run a vm within a bulid job.
svn path=/nixos/trunk/; revision=18887
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
* Replace an obscure piece of code by its equivalent based on the
recursiveUpdate function. Undefined the obsolete name of
boot.grubDevice to avoid conflicts.
svn path=/nixos/trunk/; revision=18049
with an empty password, rather than with a hashed empty password.
The latter is a security risk, because it allows remote root logins
if a user enables sshd before setting a proper root password.
* Allow empty passwords for login and slim, but nothing else.
svn path=/nixos/trunk/; revision=17833
* Renamed some of the new Grub options to more sensible names
(e.g. extraGrubEntries to extraEntries, bootMount to bootDevice,
etc.).
svn path=/nixos/trunk/; revision=17494
grub. Its options are no more inside 'boot', but inside 'boot.loader.grub'.
I added a new bootloader configuration for nixos, generationsDir. It creates
/boot/default/{init,initrd,kernel,system} symlinks, and the same for the generations
in /boot/system-$gen/{init,initrd,kernel,system}.
I can program the u-boot loader to load /boot/default files always, and have
a minimal nixos boot loader installer functionality. Additionally, I can refer
to the other system generations easily, with a simple 'ls' in /boot.
svn path=/nixos/trunk/; revision=17460
