Wow that's a great answer. Thank you to have taken the time to detail thing. It's a lot clearer now.
> 1) You point (via umlsetup.sh) at the kernel source you want, it makes an > lndir > link tree (%1) for the kernel, and compiles it. I use the "O=<output directory>" switch to compile for different architectures. You can then set different directories for binaries and .config files. True you cannot patch as you want though. I did not know "lndir", reminded me of a character in the lord of the rings : http://lotr.wikia.com/wiki/E%C3%A4rendil ^^ > 2) You also point at the UML root tree you want to use. > That's an extracted file system that lives on the host, not a COW or loopback > file. We suggest you put your UML file systems on the same disk as > your reference root file system, as it can use hard links, which is way > faster, and saves piles of disk space. This is my main interrogation. Why going through the trouble of creating a specific filesystem when there is already one working in the host ? I would like in my init to "UML$mount none /mnt/host -t hostfs" than "UML$chroot /mnt/host" (just discovered the switch_root utility in busybox). I can see problems with /proc and /dev colliding between my initramfs and my host drive. So maybe I could mount all other folders but those from my host "/" into the UML machine ? On top of that I don't see any incentive (at least in my case) to switch_root from the initramfs to a root filesystem ?! (maybe I could embed everything I need in the initramfs) > At some point, hostfs grew caching, which is annoying, because it means that > I have to rm /my/test/program from within the UML, each time before I can > make DESTDIR= install it again from the host, or the file does not update. I > wish I could turn that off. I guess you refer to CONFIG_CLEANCACHE and CONFIG_FRONTSWAP. I've just enabled them in reaction to your warning. > 02 - this sucks in some variables that tells net.A.sh, if there is a > uml_netjig (a version of uml_switch that knows how to play back pcap > files), running, or if one should use multicast sockets. This looks like a custom version. I think I wil rely on tun/tap sytems for networking since I want my VMs to interact with Internet. Btw, unstrung looks like a nice project. Once more thanks for having been through the trouble of explaining all this. It helps a lot. Best regards MAtt ------------------------------------------------------------------------------ Introducing Performance Central, a new site from SourceForge and AppDynamics. Performance Central is your source for news, insights, analysis and resources for efficient Application Performance Management. Visit us today! http://pubads.g.doubleclick.net/gampad/clk?id=48897511&iu=/4140/ostg.clktrk _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
