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Date: Fri, 16 Nov 2007 19:21:03 +0100
From: Uwe Doering <gemini@geminix.org>
Organization: Private UNIX Site
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	id 1It5oO-0005Jb-Ue; Fri, 16 Nov 2007 19:59:53 +0100
Cc: freebsd-bugs@FreeBSD.org
Subject: Re: kern/70587: [vm] [patch] NULL pointer dereference in
	vm_pageout_scan()
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kmacy@FreeBSD.org wrote:
> Synopsis: [vm] [patch] NULL pointer dereference in vm_pageout_scan()
> 
> State-Changed-From-To: open->feedback
> State-Changed-By: kmacy
> State-Changed-When: Fri Nov 16 17:27:58 UTC 2007
> State-Changed-Why: 
> 
> This sounds more like a transitory bad memory issue. Have you seen this in recent releases?

The most recent FreeBSD version we use on our production servers is 
RELENG_4, for stability reasons.  And since we have the patch from the 
PR installed on all these servers we've never had this issue again. 
This way, we of course can't say whether it would have happened again 
without the patch.

As to a transitory bad memory issue, all our servers have ECC protected 
memory, which makes hardware induced memory corruption at least very 
unlikely, though not completely impossible.

Regards,

    Uwe
-- 
Uwe Doering         |  EscapeBox - Managed On-Demand UNIX Servers
gemini@geminix.org  |  http://www.escapebox.net