linux-kernel - Re: [PATCH] panic: fix incomplete panic log in panic()

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Message-ID: <20121015220639.GT2095@tassilo.jf.intel.com>
Date:	Mon, 15 Oct 2012 15:06:39 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Qing Z <njumical@...il.com>, mingo@...nel.org, ben@...adent.org.uk,
	markivx@...eaurora.org, linux-kernel@...r.kernel.org,
	cxie4@...vell.com, binw@...vell.com, wwang27@...vell.com,
	xjian@...vell.com, zhangwm@...vell.com, Qing Zhu <qzhu@...vell.com>
Subject: Re: [PATCH] panic: fix incomplete panic log in panic()

> Also, we should be careful with things like up() on a semaphore which
> hasn't been down()ed.  Because under some Kconfig combinations, such an
> operation might trigger debugging traces and we could get into a big
> mess.  (An up() on non-down()ed semaphore is actually an OK operation,
> so this was a bad example.  But you see the problem).

iirc the debugging code normally checks oops_in_progress, so this shouldn't 
happen.

Agree on the rest of your email -- keep oops simple ... (KOSS)

-Andi
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