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Re: kdb patch for 2.6.11 and x86_64

To: jfv@xxxxxxxxxxxx
Subject: Re: kdb patch for 2.6.11 and x86_64
From: "Ray Bryant" <raybry@xxxxxxxxxxxxxxxxx>
Date: Thu, 25 Aug 2005 10:51:14 -0500
Cc: kdb@xxxxxxxxxxx, jvf@xxxxxxxxxxxx
In-reply-to: <20050825002111.GA26359@trane.bluesong.net>
References: <200508242015.55653.raybry@mpdtxmail.amd.com> <20050825002111.GA26359@trane.bluesong.net>
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On Wednesday 24 August 2005 19:21, Jack F Vogel wrote:

<snip>

Hi Jack,

>
> Hey Ray :)
>
> Is it possible for you to install SLES9 SP2 and check if
> the modular kdb there works?
>

I tested it far enough to find out that I could get into KDB and type go and 
have the system continue to run.   Didn't do anything more than a "sniff" 
test though.

> Is there anything special about the hardware I should know?
>

Nothing special.   I've tried it on all sorts of Opteron boxes, single core,
dual core, and a 2-way EMT64 box, and it fails every time.  I guess the common 
thread is that these are all SMP boxes, typically 4-socket things.   The 
SimNow case was for a simulated UP, but it was still the SMP kernel.

> When you first mentioned kprobes it worried me, I suspect that
> both kdb and kprobes are registering on the die chain, and I
> never had the opportunity to work with multiple registering.
>
> However if you say it didnt help to disable that then it must
> be something else.
>
> My access to hardware is diminished at the moment, but I will
> attempt a fresh build/test here to see what happens.
>
> Cheers,
>
> Jack

-- 
Ray Bryant
AMD Performance Labs                   Austin, Tx
512-602-0038 (o)                 512-507-7807 (c)

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