[bug #25054] Kernel panic with eth-multiplexer

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?25054>

                 Summary: Kernel panic with eth-multiplexer
                 Project: The GNU Hurd
            Submitted by: None
            Submitted on: Tue 09 Dec 2008 10:31:05 PM UTC
                Category: GNU Mach
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: antrik
        Originator Email: antrik@users.sf.net
             Open/Closed: Open
         Discussion Lock: Any
         Reproducibility: Intermittent
              Size (loc): None
         Planned Release: None
                  Effort: 0.00
Wiki-like text discussion box: 

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Details:

Transferring large files (some hundred MB) with NFS or HTTP, when using the
ethernet multiplexer (from zhengda-soc2008-virt-branch in Hurd CVS),
regularily
produces:

Assertion `object->ref_count > 0' failed in file "../vm/vm_object.c", line
346

vm_object_reference
/build/buildd/gnumach-1.3.99.dfsg.cvs20080708/build-dbg/../vm/vm_object.c:346
vm_object_collapse
/build/buildd/gnumach-1.3.99.dfsg.cvs20080708/build-dbg/../vm/vm_object.c:2689
vm_fault_page
/build/buildd/gnumach-1.3.99.dfsg.cvs20080708/build-dbg/../vm/vm_fault.c:882
vm_fault
/build/buildd/gnumach-1.3.99.dfsg.cvs20080708/build-dbg/../vm/vm_fault.c:1279
user_trap
/build/buildd/gnumach-1.3.99.dfsg.cvs20080708/build-dbg/../i386/i386/trap.c:514

This is with gnumach-dbg=2:1.3.99.dfsg.cvs20080708-1

Interestingly, doing the same with a locally built gnumach that contains the
patch enabling promiscuous mode for the network device, produces a zalloc
panic
instead. (A quick check with vmstat and ps showed growing memory use by the
multiplexer process, but haven't investigated further.) I wonder whether the
difference is because it's locally built (different toolchain?), or because
of
the patch.





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