On Fri, Jul 06, 2007 at 06:16:20PM +0100, Antoine Martin wrote:
> Hmm, works fine for me here (tested on both 32-bit and 64-bit hosts):
>
> # md5sum BusyBox-1.5.0-x86-root_fs.bz2
> 5d91bec2b09b4aabf7677e28759e86c7 BusyBox-1.5.0-x86-root_fs.bz2
> # bunzip2 BusyBox-1.5.0-x86-root_fs.bz2
> # mkdir tmp && mount -o loop BusyBox-1.5.0-x86-root_fs tmp
> # chroot tmp /bin/ash
> # exit
Strange - it no longer does the same thing here. UML also no longer
goes into an infinite SIGFPX loop. It doesn't boot - it just sits in
the idle loop. However, with init=/bin/sh, I do get a shell.
> But a pre-compiled 2.6.16.49 guest does work...
> And it gets weirder: some (but not all) guests compiled directly on this
> host do work!
> I have had success with 2.6.19 and 2.6.20 compiled locally, but not with
> 2.6.21!!!
> The compiler in both cases is the same gcc 4.1.2
Can you try 2.6.22, now that that's out? It will also give you a core
file (if ulimit allows that) if it dies - that can help diagnose
problems like this.
> Also:
> * 2.4 is a no go, I guess that TT mode hasn't been tested by anyone
> lately and that something on the host breaks it.
Yeah, I'd say forget about 2.4 at this point.
> On 64-bit hosts only:
> * guests older than 2.6.20.8 (or .9?) fail with the infamous:
> [42949377.280000] Kernel panic - not syncing: do_syscall_stub :
> PTRACE_SETREGS failed, errno = -5
> I could backport the ptrace patch to all these guests kernels (2.6.17 to
> 2.6.19) but there isn't much point - the kernels on the front page are
> all recent and have the patch included. (it was also backported to 2.6.16)
> Jeff, wasn't this fixable with a host patch as well?
I don't remember what this problem was.
Jeff
--
Work email - jdike at linux dot intel dot com
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