On Tue, Oct 4, 2011 at 11:45 PM, Lennart Poettering <mzerqung@xxxxxxxxxxx> wrote: > On Tue, 04.10.11 21:01, JB (jb.1234abcd@xxxxxxxxx) wrote: > >> Results interpretation. >> ----------------------- >> Knoppix won by a wide margin, while: >> - Knoppix having microknoppix fast-parallel boot (based on SysV/LSB scripts) >> and DE with low resources usage and tailored for desktops > >> - Fedora having systemd parallel boot and DE tailored for small and simple >> devices > > ^^^^^ huh? Fedora is not tailored for that. Would be great of it it > was, but that's simply not the case. > > We install LVM and iSCSI and all kinds of other enterprisey stuff > on even the smallest netbook. And LVM is a major source of slowness, > since it requires all devices to be synchronously settled, before > "vgscan" can be called. > > Also, we use SELinux and stuff which doesn't speed things up > either. SELinux has become a lot faster at boot in F16, so that's good, > but there's still a price to pay for it, which is more noticable the > weaker your machine is. That said, I do believe that SELinux is a good > thing and should definitely be part of the default install. > > Another bigger source of slowness at boot is currently Plymouth which > also requires synchronous settling of devices (tough it's not as bad as > LVM in that regard though, but costs too since EDID probing is > apparently quite slow, and has every right to, but right now we delay > the boot processes for that but we shoudl really do that in the > background). > > I have been asking for the removal of LVM from the default install since > a long time, and I am still firmly of the opinion that LVM needs to be > something that folks who want it enable but not something that slows > down everybody else's boot. > > If you want a quick boot on a netbook, then remove LVM, iscsi and the > other enterprisey storage stuff. Then run "systemctl mask > fedora-wait-storage.service fedora-storage-init-late.service > fedora-readonly.service fedora-storage-init.service > fedora-loadmodules.service fedora-autoswap.service > fedora-configure.service rc-local.service" to mask a couple of always-on > services, that are needed for enterprisey and legacy stuff. Also > consider disabling stuff like abrtd, or even rsyslog (if you do all log > output goes to kmsg, which reduces disk acesses and is often good > enough), and audit, cpupower, iptables, lldapd, mcelog, multipathd, > lvm2-monitor, mdmonitor, fcoe, dm-event. And *sendmail* (in my vms it takes up to 60s to start even though I never use it; and I it does not really make much sense on desktops). -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
