On Thursday 19 July 2007 16:08:34 Pekka Enberg wrote: > Hi Andi, > > On 7/19/07, Andi Kleen <[EMAIL PROTECTED]> wrote: > > qemu testing and booting test machines with i386 kernels wasn't very > > successfull > > with recent git kernels. I got either BUGs because of failing sysfs > > initialization > > or oopses in kmalloc, but no user land. > > > > I bisected it down to this commit. > > > > To reproduce: try to boot a 386 defconfig kernel, compiled with gcc 4.1, in > > qemu > > [snip] > > > 6cb8f91320d3e720351c21741da795fed580b21b is first bad commit > > commit 6cb8f91320d3e720351c21741da795fed580b21b > > Author: Christoph Lameter <[EMAIL PROTECTED]> > > Date: Tue Jul 17 04:03:22 2007 -0700 > > > > Slab allocators: consistent ZERO_SIZE_PTR support and NULL result > > semantics > > I have i386 defconfig kernel + qemu + busybox userland image + GCC > 4.1.2 booting ok here. Did you manage to capture the oops?
The sysfs crashes are all over; the first I saw is the BUG_ON() in kernel_param_sysfs_setup(); but it was changing during the bisect and in other similar sysfs BUG_ON()s too. During one bisect state I also had a crash in kmalloc itself. I right now don't have it anymore; do you want me to restart the bisect go recreate it? x86-64 kernels BTW work just fine; just something seems to be broken with i386. Unfortunately newsetup seems to have broken argument passing to qemu so it's a bit difficult to get more out of it. > Is the > userland image available somewhere? Userland is not reached yet. You can just use a dummy dd if=/dev/zero of=.... bs=1M count=1 file. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
