On Fri, 2007-01-19 at 16:14 +0000, Antoine Martin wrote: > Daniel Gryniewicz wrote: > > I'm the gentoo usermode-sources maintainer, and I run UML almost > > exclusively on amd64. I have, at any given time, from 4 to 20 UMLs > > running on my main dev box, most of them 32-bit, and I haven't had any > > stability problems. > Can you send me more details of your setup as I am quite experienced > with UML and now completely stuck with AMD64. > > > Is your RAM OK? > Oh yes, this has nothing to do with the hardware. > > > Which kernels do you have inside and outside? > Host (outside): > 2.6.19.2-skas3-v8.2
Okay, that's one big difference. I have a stock kernel (well, gentoo-sources) on the outside, not a SKAS3 patched kernel. Maybe that makes a difference on amd64? > Inside: pick any of those (none of them work with >=2.6.16): > http://uml.nagafix.co.uk/ > > > How are > > you trying to build the 32-bit UMLs? > These are the same as on the site above (which I maintain) and these > have worked flawlessly for a long long time. > > I have downgraded the x86 boxes to 2.6.15.7 and these are up and running > again. But I can't do that for all of them, and this is just not an > option for some of the amd64 boxes. My setup is: Host boxes: - Dual dual-core opteron 265 with 6GB of RAM running 2.6.17-gentoo-r8 - Turion laptop with 2GB of RAM running currently 2.6.20-rc5 (stock) but most recently 2.6.19-ck1 (stock). - Athlon64 3000+ with 1GB of RAM running ck-sources-2.6.19_p2-r3 Notice, no UML related patches on the host boxes. UML Boxes: - usermode-sources-2.6.16-r6 (2.6.16 with genpatches 15 and -bs2) - usermode-sources-2.6.18-r1 (2.6.18 with genpatches 8 and -bb2) - Modified usermode-sources-2.6.14-r6 (2.6.14 with -bs3 and networking patches for work) (this one also runs on 32-bit hosts running various gentoo kernels on workstations at work) All of these run some form of Gentoo inside; not necessarily recent. Each of them runs in both 32 and 64 bit versions. I have also briefly run a UML with a fedora core 2 image, running a usermode-sources-2.6.18 kernel, on the opteron box, but that was only very briefly. That's a 32-bit only UML. Daniel
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