linux-kernel - Re: [patch] add kdump_after

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Message-ID: <20070814083710.GA14538@suse.de>
Date:	Tue, 14 Aug 2007 10:37:10 +0200
From:	Bernhard Walle <bwalle@...e.de>
To:	Takenori Nagano <t-nagano@...jp.nec.com>
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

* 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”).


Thanks,
   Bernhard
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