On Fri, May 20, 2016 at 10:56:19AM +0200, Didier Kryn wrote: > Le 19/05/2016 21:14, Rainer Weikusat a écrit : > >[I already strongly suspected the below but didn't want to write about > >it until I had a chance to test] > > > >THe initramfs doesn't need to include all the modules belonging to the > >kernel, just those which are needed to mount the real root filesystem > >(containing the remaining driver modules). This would mean all > >filesystems and storage device drivers you want to support but, eg, no > >networking modules (nfsroot sounds like an implausible feature for a > >live image). > > If you mean to run your live system with the cdrom as the root > filesystem, then the only drivers you need during the initramfs > phase are those needed to mount the cdrom, ie the iso9660 filesystem > and the drivers needed to access the cdrom, which includes the USB > stack in case of a separate cdrom drive.
You need a few more things for a generic live, e.g. support for all the disk controllers, support for aufs and other union filesystems, the full USB stack, and several drivers from the scsi/ bundle, which are needed to deal with cdroms... But yes, in principle you can trim out eveything else, which is what I have done so far. On top of that, I am now working in a further stripped-down initrd which lacks also support for esoteric hw (scsi controllers, fiberchannel, and the like), and the result is an xz image which is barely 7 MB. I am planning to include it as a boot option in the unofficial minimal live, which might be used in 99% of the cases and will allow the system to boot with as low as 64 MB of RAM :) > > Actually, either you keep the stock kernel and put only the few > modules you need in the initramfs, or you configure your kernel > build to have all these drivers and filesystem statically linked and > you don't even need an initramfs at all. > Yep, but this is not a viable option for live systems, since it is not easy to customise... HND KatolaZ -- [ Enzo Nicosia aka KatolaZ --- GLUG Catania -- Freaknet Medialab ] [ me [at] katolaz.homeunix.net -- http://katolaz.homeunix.net -- ] [ GNU/Linux User:#325780/ICQ UIN: #258332181/GPG key ID 0B5F062F ] [ Fingerprint: 8E59 D6AA 445E FDB4 A153 3D5A 5F20 B3AE 0B5F 062F ] _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
