linux-kernel - Re: [Patch 0/8] V3 Implement crashkernel=auto

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Message-ID: <m1k5182dl7.fsf@fess.ebiederm.org>
Date:	Thu, 13 Aug 2009 03:49:24 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Bernhard Walle <bernhard.walle@....de>
Cc:	Amerigo Wang <amwang@...hat.com>, linux-kernel@...r.kernel.org,
	tony.luck@...el.com, linux-ia64@...r.kernel.org,
	Neil Horman <nhorman@...hat.com>,
	Andi Kleen <andi@...stfloor.org>, akpm@...ux-foundation.org,
	Fenghua Yu <fenghua.yu@...el.com>, Ingo Molnar <mingo@...e.hu>,
	Anton Vorontsov <avorontsov@...mvista.com>
Subject: Re: [Patch 0/8] V3 Implement crashkernel=auto

Bernhard Walle <bernhard.walle@....de> writes:

> * Amerigo Wang <amwang@...hat.com> [2009-08-13 10:19]:
>> Sure.
>> 
>> But if we disable CONFIG_KEXEC_AUTO_RESERVE, that means
>> crashkernel=auto will be invalid, this is the same as it is now.
>
> Ok, but since 'crashkernel=auto' is not used today, nobody has
> 'crashkernel=auto' in the bootloader configuration. So I don't see any
> practial advantage of that config option.
>
> Eric, what's your opinion on that, do we need a config option
> CONFIG_KEXEC_AUTO_RESERVE or could we just implement that feature
> unconditionally (if CONFIG_KEXEC is enabled, of course).

The only reason I can see the option going away would be
a dependency on CONFIG_HOTPLUG_MEM.

Eric
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