On Monday 03 October 2005 15:46, Chris Lightfoot wrote:
> On Mon, Oct 03, 2005 at 08:39:46AM -0400, Jeff Dike wrote:
> > On Mon, Oct 03, 2005 at 09:28:04AM +0100, Chris Lightfoot wrote:
> > > At the cost that lots of programs in the guest simply
> > > won't work (strace, make, java, ime). Or has there been
> > > work fixing this?
> > What are you talking about? sysemu breaks nothing inside the guest.
> Using 2.6.12.5, on a host running 2.4.27 with the sysemu
> patch, within the guest we get:
> root@(none):/# strace /bin/echo
> execve("/bin/echo", ["/bin/echo"], [/* 5 vars */]) = 0
>
> root@(none):/#
> -- i.e., misleading/incorrect/incomplete output.
Ok, this is exactly what I saw time ago.
I tested it now (it was fixed and broke again once) but it works...
the biggest difference is that you're using a 2.4 host, while here I'm under a
2.6 one.
It probably means the problem is the 2.4 patch, which is perfectly reasonable.
I can't recommend against 2.4 host (there are reasonable reasons against 2.6),
but given that sysemu can be disabled, I don't think I'll have the time to
fix this. (Note: 2.4.27 has probably some security bugs - upgrading to
2.4.31, or to the latest -hf (hotfixes) tree, is recommended).
> I haven't been able to properly characterise the problems
> with the other programs I name, but since they go away
> when sysemu support is removed/disabled, I presume that
> they are related.
Hmm, that's strange, but still may be possible.
However, in your other mail you say you either can't characterize them, or
that some of those errors could have been with 2.4 guests.
Finally, I also recall (don't know from where) there may be problems with Perl
and timing tests - nanosleep() on UML isn't sufficiently precise, and doesn't
pass testing with LinuxTestProject.
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
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