linux-kernel - Re: [patch] add kdump_after

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Date:	Thu, 16 Aug 2007 11:45:11 +0200
From:	Bernhard Walle <bwalle@...e.de>
To:	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [patch] add kdump_after_notifier

* Takenori Nagano <t-nagano@...jp.nec.com> [2007-08-16 11:26]:
> Vivek Goyal wrote:
> > - Modify Kdump to register on die_chain list. 
> > - Modify Kdb to register on die_chain list.
> > - Export all the registered members of die_chain through sysfs along with
> >   their priorities. Priorities should be modifiable. Most likely one 
> >   shall have to introduce additional field in struct notifier_block. This
> >   field will be a string as an identifier of the user registerd. e.g
> >   "Kdump", "Kdb" etc.
> > 
> > Now user will be able to view all the die_chain users through sysfs and
> > be able to modify the order in which these should run by modifying their
> > priority. Hence all the RAS tools can co-exist.
> 
> This is my image of your proposal.
> 
> - Print current order
> 
> # cat /sys/class/misc/debug/panic_notifier_list
> priority   name
> 1          IPMI
> 2          watchdog
> 3          Kdb
> 4          Kdump

I think something like

/sys/class/misc/debug/panic_notifier/ipmi/priority
/sys/class/misc/debug/panic_notifier/watchdog/priority
/sys/class/misc/debug/panic_notifier/kdb/priority
/sys/class/misc/debug/panic_notifier/kdump/priority

would be better. It's more self-describing if you want to change the
order.



Thanks,
   Bernhard

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