linux-kernel - Re: [PATCH 5/6] From: Andrew Morton <akpm@...l.org>

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Message-ID: <17697.58794.113796.925995@cargo.ozlabs.ibm.com>
Date:	Tue, 3 Oct 2006 14:23:06 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@....de>, Hugh Dickens <hugh@...itas.com>,
	Michael Ellerman <michael@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 5/6] From: Andrew Morton <akpm@...l.org>

Jeremy Fitzhardinge writes:

> When my test machine hits a BUG, it simply returns from the exception handler
> after a second or so and reexecutes the bug.
> 
> This is independent of the use-generic-bug changes and might be related to
> XMON.
> 
> So it's some unknonw bug, and this change makes the powerpc kernel behave
> better when that bug hits.

NACK as to this part:

> +			if (btt == BUG_TRAP_TYPE_BUG)
> +				do_exit(SIGSEGV);

since it makes the kernel behave distinctly *worse* for me.

Paul.
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