Subject: Re: Kernel hang in amap_wipeout
To: Robert Swindells <>
From: Manuel Bouyer <>
List: tech-kern
Date: 02/23/2003 20:58:25
On Thu, Feb 20, 2003 at 11:55:08PM +0000, Robert Swindells wrote:
> I am getting a "fatal page fault in supervisor mode" from amap_wipeout()
> whenever I exit from a lisp system that I am trying to debug.
> The lisp system (CMUCL) has allocated a lot of anonymous maps, which
> may not be the most sensible thing to do, but I wouldn't expect it
> to bring down the whole system.
> I have got a debug kernel built, and can probably provide remote access
> to the system if it helps.
> The stack dump is:
> db> t
> amap_wipeout(e43a61e8,e43c1088,e3959edc,c01df930,e43d5800) at amap_wipeout+0x1d
> amap_unref(e43a61e8,afa,fb,0,e4394004) at amap_unref+0x23
> uvm_unmap_detach(e438d1d8,0,bfc00000,e3959f38,0) at uvm_unmap_detach+0x57
> uvmspace_free(e4394004,e4393004,e3959f8c,c01c87b6,e4393004) at uvmspace_free+0x66
> uvm_proc_exit(e436869c,e4393004,1,e393b380,e393b380) at uvm_proc_exit+0x14
> reaper(e393b380,0,0,0,c010030c) at reaper+0xdd

can you try to get a core dump ?

Manuel Bouyer <>
     NetBSD: 23 ans d'experience feront toujours la difference