Ticket #407 (closed defect: wontfix)
lx86cl hangs on Linux Xen domU running on Amazon EC2
|Reported by:||sctb||Owned by:||gb|
|Component:||Runtime (threads, GC)||Version:||trunk|
|Keywords:||ec2 xen linux x86||Cc:|
I'm experiencing strange behavior from CCL on Linux x86. When invoking it in the normal way (ccl/scripts/ccl) as well as directly (./lx86cl lx86cl.image) I receive no output from the application. It does not respond to C-c or C-d, nor can I execute any Lisp forms.
Linux domU-12-31-39-02-6A-15 18.104.22.168-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 athlon i386 GNU/Linux
Notes from openmcl-devel, R. Matthew Emerson:
"I tried to run the lisp on an EC2 image myself.
What seems to happen is that the lisp kernel starts up, maps in the heap image, and starts running lisp code, which pretty much immediately tries to allocate memory by taking a trap (int $0xc5 on x86 systems).
For some reason, instead of generating a SIGSEGV like we expect, the system just sort of sits there, dumbly staring at the alloc_trap in a puzzled manner.
I don't know if this a symptom of running on Xen or whether there is some other peculiarity of Amazon's EC2 set-up. I have run Clozure CL on a a Linux Xen instance before, though it was a 64-bit version."