linux-kernel - Re: [PATCH 0/2] add new notifier function

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Message-ID: <4705CEEA.6060100@ah.jp.nec.com>
Date:	Fri, 05 Oct 2007 14:43:06 +0900
From:	Takenori Nagano <t-nagano@...jp.nec.com>
To:	vgoyal@...ibm.com
CC:	linux-kernel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	k-miyoshi@...jp.nec.com, kexec@...ts.infradead.org,
	Bernhard Walle <bwalle@...e.de>, Keith Owens <kaos@....com.au>,
	Andrew Morton <akpm@...ux-foundation.org>, kdb@....sgi.com
Subject: Re: [PATCH 0/2] add new notifier function

Vivek Goyal wrote:
> On Thu, Oct 04, 2007 at 08:38:05PM +0900, Takenori Nagano wrote:
>
> In summary, right now co-existence of kdb with kdump seems to be your pain
> point. I would prefer that kdb just puts a break point on panic() and we move
> on. If there are more candidates down the line and these can't be easily
> executed in second kernel then we can re-visit this notification list
> mechanism.

Hi Vivek,

Thank you for your comment. :-)

I don't mind kdb and kdump problem now. Because my patches are not merged into
mainline kernel yet. If they are merged, I think how we can resolve about RAS
tools problem.

>> # ls
>> ipmi_msghandler  ipmi_wdog
>> # cat ipmi_msghandler/priority
>> 200
>> # cat ipmi_wdog/priority
>> 150
>> #
>> Kernel panic - not syncing: panic
>> ipmi_msghandler : notifier calls panic_event().
>> ipmi_watchdog : notifier calls wdog_panic_handler().
>>
>> .....(reboot)
>>
> 
> We also need to implement a file which can give a consolidated view. All
> the registered members and their priority.

I tried to implement it, but its impact is large. And we can get all priority
values using "ls" and "cat */priority". I'll implement it if user strongly
expects it.

ex)
# cd panic_notifier_list
# ls
ipmi_msghandler  ipmi_wdog
# cat */priority
200
150
#

Thanks,

Takenori Nagano <t-nagano@...jp.nec.com>
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