On Thursday 07 August 2008 22:55:09 Andrew Zabolotny wrote: > Graham Cobb <[EMAIL PROTECTED]> wrote: > > I am currently looking into whether I can create a UML kernel which > > runs reliably enough to do building on lenny 32-bit and 64-bit > > systems. I am optimistic but am currently having difficulty coming > > up with a UML kernel which will (i) build, and (ii) run scratchbox > > for a whole GPE build without hitting a kernel panic or breaking > > scratchbox. > > You also can try qemu-kvm which is what I currently use for > maemo development on Fedora x86_64. Since the emulated machine is > 32-bit, I have scratchbox in Ubuntu 8.04 working inside it without > problems (with vm.vdso_enabled=0 and vm.mmap_min_addr=4096 > in /etc/sysctl.conf). The overall performance drop is about 30% > compared to host OS (tested on a large build of gcc+glibc+binutils).
I currently use QEMU -- it is the most reliable option but also by far the slowest. Note that my processor does not have the virtualisation extensions and so I cannot use KVM -- I get less than 10% performance on real scratchbox builds (a GPE build that takes 45 minutes native takes about 6-9 hours in my QEMU system). I use UML on another system and it is a good compromise. It achieves near native speed. My only problem is creating a reliable UML kernel. I am hopeful I will eventually succeed! But, it would be better if scratchbox and the Maemo SDK would run on debian lenny 64-bit kernels (in a chroot). Graham _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
