linux-kernel - Re: [patch] add kdump_after

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Message-ID: <46C16C7B.603@ah.jp.nec.com>
Date:	Tue, 14 Aug 2007 17:48:59 +0900
From:	Takenori Nagano <t-nagano@...jp.nec.com>
To:	Bernhard Walle <bwalle@...e.de>
CC:	vgoyal@...ibm.com, Keith Owens <kaos@....com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	k-miyoshi@...jp.nec.com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch] add kdump_after_notifier

Bernhard Walle wrote:
> * Takenori Nagano <t-nagano@...jp.nec.com> [2007-08-14 10:34]:
>> Vivek Goyal wrote:
>>> On Fri, Aug 03, 2007 at 02:05:47PM +1000, Keith Owens wrote:
>>>
>>>
>>> To sum up, couple of options come to mind.
>>>
>>> - Register all the RAS tools on die notifier and panic
>>>   notifier lists with fairly high priority. Export list
>>>   of RAS tools to user space and allow users to decide the
>>>   order of execution and priority of RAS tools.
>>>
>>> - Create a separate RAS tool notifier list (ras_tool_notifer_list).
>>>   All the RAS tools register on this list. This list gets priority
>>>   over die or panic notifier list. User decides the oder of execution
>>>   of RAS tools. 
>>>
>>>   Here assumption is that above list will not be exported to modules.
>>>   All the RAS tools will be in kernel and they always get a priority
>>>   to inspect an event.
>>>
>>> What do others think?
>> Very good idea. But there is a problem how to give default priority to RAS tools.
>>
>> How about priority changeable notifier_list? User can change list order
>> dynamically if they want. Of course, we have to give highest priority to kdump
>> by default. It is very useful for users who want to use some RAS tools.
> 
> I think that was the idea of the first “-” (“export list of RAS tools
> to user space”).

Ah, sorry.

I think first idea is very good. How export the list? (sysfs? procfs?)
-
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