From owner-freebsd-stable@FreeBSD.ORG  Mon Nov 10 14:44:12 2003
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Date: Mon, 10 Nov 2003 14:44:12 -0800
From: Prafulla Deuskar <pdeuskar@freebsd.org>
To: David Malone <dwmalone@maths.tcd.ie>
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	from dwmalone@maths.tcd.ie on Mon, Nov 10, 2003 at 06:43:11PM +0000
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Subject: Re: Panic on -stable with 10 Gigabit driver
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Thanks for the tools.

It shows that cluster pointer is corrupted:

vidya:[ttyv1] minfo> ./minfo -N ../kernel.debug.1 -M ../vmcore.1
mb_map: 4272/81920 K used (5.21%)
map start: 0xc2079000, end 0xc7079000
 1068/20480 pages used, 17088 mbuf-size slots
Checking cluster ref counts
Scanning cluster free list...minfo: Cluster pointer 0x7007800 out of range!

-Prafulla


David Malone [dwmalone@maths.tcd.ie] wrote:
> On Mon, Nov 10, 2003 at 09:32:08AM -0800, Prafulla Deuskar wrote:
> > So what is the solution for this issue other than maintaining our own free list?
> 
> Ian Dowse has some tools for looking at the freelist in a core,
> that might be useful in debugging this.
> 
> 	http://www.maths.tcd.ie/~iedowse/FreeBSD/minfo.tar.gz
> 
> Ian also had some patches for making clusters read-only when they
> were free, but I don't think we have those patches any more.
> 
> 	David.