Bruce Dubbs <bruce.dubbs <at> gmail.com> writes: > Slightly reformatted, it would be very nice as a hint.
Thanks Bruce for your encouraging comments and for uploading the hint. > Chris W. wrote: > > Systemd > > has matured quite a bit since last year and more distributions are > > using it, among them Arch Linux. > > OTOH, Gentoo is creating a udev fork. I agree, that it should not be necessary to install all of systemd just to use udev. The current ebuild (udev-193.ebuild) is still built from systemd sources with patches and a custom makefile as far as I can tell. Gentoo does have good support for systemd; ./configure --with-distro=gentoo is integrated upstream. Just as fedora, suse, debian, arch, altlinux, mandriva, mageia and angstrom. There is even an unofficial slackware package ;-) A few distros have adopted systemd as the default init system. > Did you ever run 'mount' from the command line? Yeah, and I read your discussion about it with Zach on this list from January. I only see 4 cgroups listed though; not as many as in your example. But definitely there is room for improvement here. I would prefer to have an option in mount to hide cgroups and all the tmpfs. Maybe submit a bug-report/feature-request to http://vger.kernel.org/vger-lists.html#util-linux, as this is an issue of the kernel exposing cgroups and `mount` (without the mtab file) reporting all kinds of stuff we don't really want to see. > > Bootup and shutdown times are considerably faster than > > with SysVinit. > > Do you have any data? How fast can you get from grub to the login > prompt using systemd? sysvinit? What hardware are you using? LFS 7.2 from grub to login prompt and back with 2.4 Ghz (dual) Core i5 on the notebook running in Parallels 8, no SSD: SysVinit: 15 sec. bootup, 14 sec. shutdown Systemd : 4.5 sec. bootup, 4 sec. shutdown Average over more than five bootups/shutdowns. Systemd logs show about 4.2 secs. Using a 3.5.4. Linux kernel with mostly default options and those needed for systemd. Apart from ksyslogd and udev, network and sshd gets started. Results on a shared Linode Xen Server, 512MB ram, 2.26 Ghz multi-core, raid 6 storage using pvgrub, monitored from a Lish console: SysVinit: 6 sec. bootup, 22 sec. shutdown Systemd : 5 sec. bootup, 4 sec. shutdown If I add Plone on the server, the differences become larger: SysVinit: 26 sec. bootup, 30 sec. shutdown Systemd : 11 sec. bootup, 10 sec. shutdown > > How to install Systemd-193 on LFS > > ================================= > > Very well written. Slightly reformatted, it would be very nice as a > hint. I do think the set of instructions is longer than anything else in LFS/BLFS. > -- Bruce One reason the instructions got longer, was, because I could not get systemd to work without uninstalling udev-188 first. The custom lfs makefile installs udev in locations, that I find hard to match with the configure options of systemd. Also, if systemd is installed in /lib, rather than /usr/lib, D-Bus suddenly cannot find it any more. Maybe someone could suggest a more elegant solution to this. Also replacing one init system with another covers a lot of ground. In the LFS book the bootscripts make up more than 50 pages, and the instructions for sysvinit another 5 pages. Most of this is covered by systemd and a number of much smaller unit files. Chris --- (I hope this didn't get double-posted, as gmane seems to have swallowed my post yesterday.) -- http://linuxfromscratch.org/mailman/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
