linux-kernel - Re: preemption counter havoc on kgdb-taken faults

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Message-ID: <468E88CE.2060809@windriver.com>
Date:	Fri, 06 Jul 2007 13:24:14 -0500
From:	Jason Wessel <jason.wessel@...driver.com>
To:	Jan Kiszka <jan.kiszka@....de>
CC:	kgdb-bugreport@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: preemption counter havoc on kgdb-taken faults

Jan Kiszka wrote:
>
> At this chance... Reminds me that this old issue still seems to be
> unsolved in current kgdb:
>
> http://www.mail-archive.com/kgdb-bugreport@lists.sourceforge.net/msg00442.html
>
> I'm only looking at that spot in kgdb right now and /may/ oversee new
> border conditions elsewhere. But my feeling is there are none.
>
> Jan (looking forward to see kgdb merged)
>
>   

Hi Jan,

This issue was fixed in a generic way in the patch set that is in the 
-mm tree.  Had you tried your test case in the current -mm tree?

The problem you mentioned was fixed by saving and restoring the preempt 
count as a part of the fault handling from the kgdb core and not in the 
arch specific portion.

Jason.
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