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Date: Fri, 07 Aug 2009 23:31:52 +0200
From: Bernhard Walle <bernhard.walle@gmx.de>
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To: "Eric W. Biederman" <ebiederm@xmission.com>
CC: Amerigo Wang <amwang@redhat.com>, Neil Horman <nhorman@redhat.com>,
       linux-kernel@vger.kernel.org, tony.luck@intel.com,
       linux-ia64@vger.kernel.org, akpm@linux-foundation.org,
       Ingo Molnar <mingo@elte.hu>, Anton Vorontsov <avorontsov@ru.mvista.com>,
       Andi Kleen <andi@firstfloor.org>,
       Kexec Mailing List <kexec@lists.infradead.org>
Subject: Re: [Patch 0/7] Implement crashkernel=auto
References: <20090805112123.6552.73574.sendpatchset@localhost.localdomain>	<m1eirqtmey.fsf@fess.ebiederm.org>	<20090805140408.GJ7259@hmsreliant.think-freely.org>	<m1skg5vpgg.fsf@fess.ebiederm.org> <4A7A3A78.7080200@redhat.com>	<m1y6pxr737.fsf@fess.ebiederm.org> <4A7A506B.2060008@redhat.com>	<m1ljlxsiox.fsf@fess.ebiederm.org> <4A7A70E5.2010204@redhat.com>	<m1bpmtqxjh.fsf@fess.ebiederm.org> <4A7A7A0F.6070906@redhat.com>	<m1iqh1nxv3.fsf@fess.ebiederm.org> <4A7A9E54.60705@redhat.com> <m1iqgze740.fsf@fess.ebiederm.org>
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Eric W. Biederman schrieb:
> 
> With the current set of crashkernel= options we are asking the
> distribution installer to perform magic.  Moving as much of this logic
> into a normal init script for better maintenance is desirable.

Not (necessarily) the installer but the program that configures kdump.
system-config-kdump on Red Hat, YaST on SUSE.

> Bernhard does that sound useful to you?

I don't see any problems. I don't know how much effort is it to free
already reserved crashkernel memory, but I guess it's not really
complicated. Maybe that "1/32" should be specified on the command line like


	crashkernel=>>5

(for 1/32*system_memory == system_memory>>5), OTOH I have no real strong
opinion.


Regards,
Bernhard