Hi Jeff, > How consistent is this?
Hard to say. As I have mentioned, it happens on a random basis. But I am observing it roughly once every 5-6 successful attempts. > I just tried a bunch of times with the recipe you gave, and saw no problems. In the meantime, I have performed some other experiments with the published 2.6.24-rc5, as the behavior seems to be independent of the um kernel version. The formula is still the same: attempting to "simultaneously" launch a couple of virtual machines and looking for errors, everything repeated some 10 times or more. This allowed me to narrow down the possible cause to the 2.6.21 series of host kernels. In fact, I have observed the following outcome: 1) 2.6.12 host (from a Knoppix Live CD), 2.6.24-rc5 um: never failed 2) 2.6.16.4 host, 2.6.24-rc5 um: never failed 3) 2.6.16.16 host, 2.6.24-rc5 um: never failed (this was improperly reported as failing in my previous mail) 4) 2.6.21-rc4 host, 2.6.24-rc5 um: random errors 5) 2.6.21.5 host, 2.6.24-rc5 um: random errors 6) 2.6.23.12 host, 2.6.24-rc5 um: never failed All the host kernels, with the exception of 1) and 3), used the same configuration file (but for newly introduced options). Modules loaded during the experiments were more or less the same, with small differences on some irrelevant ones (fan, ac97_bus, fuse, etc.). The above results seem to suggest that the problem only affects 2.6.21 hosts, provided that the "never failed" above is not due to a sequence of lucky coincidences. I have also tried with more than 2 UML instances, though, and still did not observe the problem. Thank you and regards, Massimo. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
