linux-kernel - Re: [PATCH v1 1/6] Add oops notification chain.

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Message-ID: <AANLkTim4fG0-F0+E-DHa4=XGdk1rFbRA68nvt9bfURiK@mail.gmail.com>
Date:	Tue, 25 Jan 2011 13:43:14 -0800
From:	Aaron Durbin <adurbin@...gle.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Mike Waychison <mikew@...gle.com>, Greg KH <greg@...ah.com>,
	torvalds@...ux-foundation.org, San Mehat <san@...gle.com>,
	Duncan Laurie <dlaurie@...gle.com>,
	linux-kernel@...r.kernel.org, Tim Hockin <thockin@...gle.com>
Subject: Re: [PATCH v1 1/6] Add oops notification chain.

On Tue, Jan 25, 2011 at 1:36 PM, Jeff Garzik <jeff@...zik.org> wrote:
> On 01/25/2011 03:01 PM, Mike Waychison wrote:
>>
>> On Mon, Jan 24, 2011 at 6:06 PM, Greg KH<greg@...ah.com>  wrote:
>>>
>>> On Mon, Jan 24, 2011 at 04:24:39PM -0800, Mike Waychison wrote:
>>>>
>>>> From: Aaron Durbin<adurbin@...gle.com>
>>>>
>>>> Later firmware patches in this series would like to be able to be
>>>> notified whenever an oops occurs on the system, so that it can be
>>>> recorded in the boot log.
>>>>
>>>> This patch introduces a notifier_block called "oops_notifier_list"
>>>> so that drivers can register to get called whenever an Oops is
>>>> triggered.
>>>
>>> But we already have a panic notifier list.  Why create a new one?
>>> What's wrong with the existing one that doesn't work properly for you?
>>
>> AFAICT, the panic notifier list doesn't get called on oops.
>
> Have you tried playing with panic_on_oops ?

Yes. We actually run in that setup. However, oops != panic. They are 2
distinct events. Sometimes we panic without the oops under certain
situations. That is why it is desirable to have 2 distinct events.
>
>        Jeff
>
>
>
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