On Friday 24 November 2006 15:50, Peder Chr. Nørgaard wrote: > > I have a correction to the original report; well, the report is correct, > but I had made a mistake, which I corrected with no effect to the problem. > I am not running this on a -686 CPU, but on an AMD Athlon, so I should > really use -k7 kernels all the way through. So I switched to a mainstream > -k7 kernel and a home-built -k7 kernel with SKAS; no changes, works fine on > mainstream kernel, but the bug is still when SKAS patch is added to host > system. So the problem *may* theoretically be local to the fact that I am > using an AMD Athlon CPU; I just don't think that is very likely. If I can, > I will try it out on a Pentium-based computer. >
Hello. I have now got my hands on a Pentium-based computer, and, to my big surprise, the problem is *not* manifest on the Pentium-based PC. Let me recapture: the problem is, that linux 2.6.18 kernel patched with the skas patch distributed by Debian package linux-patch-skas (which is really just the skas patch from blaisorblade's workshop) does not work with the (x86-variant agnostic) user-mode-linux distributed by Debian. The user-mode-linux hangs consistently somewhere in the boot process, described in a little more detalins in my original report. But I have only observed the problem on my AMD Athlon XP 2200+; today, when I try to do the same thing on an Intel Pentium (it is a Pentium M) it works just fine. Whether it works on the AMD or not has nothing to do with whether I build the host kernel as -686 or -k7 - the problem is manifest in both cases. So it is related to the chip rather than to the compilation, I think. So it seems that the problem is local to both 2.6.18 *and* the AMD Athlon CPU; I realize that this does not exactly makes it easier to figure out what happens. Please, if I can be of any assistance, tell me how. The problem is easy to reproduce, and even though I don't know much about the internals of user-mode-linux - I am just a happy user of user-mode-linux for testing and similar purposes - I do now a little about how to drive a gdb around in a guest kernel. If someone would tell me what to look for, I might be able to figure out at least where in the boot sequence the guest is hanging best regards -- Peder Chr. Nørgaard e-mail: [EMAIL PROTECTED] Gefionsvej 19 spejder-e-mail: [EMAIL PROTECTED] DK-8230 Åbyhøj tel: +45 87 44 11 99 Denmark mob: +45 30 91 84 31