From owner-freebsd-alpha  Wed Nov  6 15:13:14 2002
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Date: Wed, 6 Nov 2002 18:13:08 -0500 (EST)
From: Jeff Roberson <jroberson@chesapeake.net>
To: Matthew Jacob <mjacob@feral.com>
Cc: jeff@freebsd.org, <alpha@freebsd.org>, <alc@freebsd.org>,
	<jhb@freebsd.org>
Subject: Re: alpha: top of tree kernel blooie
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On Tue, 5 Nov 2002, Matthew Jacob wrote:

>
> Slab at 0xfffffc0016a55f78, freei 59 = 0.
> panic: Duplicate free of item 0xfffffc0016a55620 from zone
> 0xfffffc001fff3740(MAP ENTRY)
>
> cpuid = 2;
> panic
> Stopped at      Debugger+0x34:  zapnot  v0,#0xf,v0      <v0=0x0>
> db> t
> Debugger() at Debugger+0x34
> panic() at panic+0x1a4
> uma_dbg_free() at uma_dbg_free+0x170
> uma_zfree_arg() at uma_zfree_arg+0x130
> vm_map_entry_dispose() at vm_map_entry_dispose+0x44
> vm_map_entry_delete() at vm_map_entry_delete+0x68
> vm_map_delete() at vm_map_delete+0x32c
> vm_map_remove() at vm_map_remove+0x64
> exit1() at exit1+0x510
> sys_exit() at sys_exit+0x58
> syscall() at syscall+0x358
> XentSys() at XentSys+0x64
> --- syscall (1, FreeBSD ELF64, sys_exit) ---
> --- user mode ---
> db>
>
>
> 4 processor SMP 4100, doing a make -j4 buildworld
>
>

Is this repeatable?  I'm still trying to get my 4100 up on current.  I
heard from jhb that there are some alpha pmap races.  I wonder if this
could be related?

Alan, do you have any ideas?

Cheers,
Jeff


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