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From: John Baldwin <jhb@freebsd.org>
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Cc: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
Subject: Re: FreeBSD-9 crash at swapctl -d
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On Monday, March 05, 2012 3:32:22 am Wojciech Puchar wrote:
> repeatable crash when turning off my 9GB swap partition (of which 0 bytes 
> was used):
> 
> Dump header from device /dev/ada0b
>   Architecture: amd64
>   Architecture Version: 2
>   Dump Length: 198971392B (189 MB)
>   Blocksize: 512
>   Dumptime: Mon Mar  5 09:29:41 2012
>   Hostname: wojtek.tensor.gdynia.pl
>   Magic: FreeBSD Kernel Dump
>   Version String: FreeBSD 9.0-STABLE #0: Sun Mar  4 22:58:17 CET 2012
>     root@wojtek.tensor.gdynia.pl:/usr/src/sys/amd64/compile/wojtek
>   Panic String: blist_meta_fill: allocation too large
>   Dump Parity: 606467164
>   Bounds: 0
>   Dump Status: good

Can you fire up kgdb on the crash dump and get a stack trace?  Can you also go 
to the frame for 'blist_meta_fill' and do 'p count' and 'p radix'?

-- 
John Baldwin