linux-kernel - [Suggestion] about calling debug_hotplug_cpu() which enabled by 'allmodconfig' for a x86

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Message-ID: <524B8E97.1030707@asianux.com>
Date:	Wed, 02 Oct 2013 11:10:15 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	the arch/x86 maintainers <x86@...nel.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>, toshi.kani@...com,
	rafael.j.wysocki@...el.com, isimatu.yasuaki@...fujitsu.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [Suggestion] about calling debug_hotplug_cpu() which enabled by 'allmodconfig'
 for a x86_64 dual core laptop.

Hello Maintainers:

Under my x86_64 dual core laptop, I build kernel next-20130927 with
'allmodconfig', and install it, the machine can not start. Related
information is:

  after call debug_hotplug_cpu(), output "cpu 0 is offline" .... and then "Failed to execute /init".

After remove "_debug_hotplug_cpu(0, 0);", can pass the issue (but will
fail in another place). I guess, the reason is my laptop cpu is not
'hotplug', but have to call debug_hotplug_cpu() with allmodconfig.

I will continue analyzing, welcome any additional suggestions or
completions.

Thanks.
-- 
Chen Gang
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