linux-kernel - Re: [PATCH] x86: let MPS support selectable

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Message-ID: <20080619124914.GA1843@elte.hu>
Date:	Thu, 19 Jun 2008 14:49:14 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yhlu.kernel@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Exner <dex@...gonslave.de>, Len Brown <lenb@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: let MPS support selectable


* Ingo Molnar <mingo@...e.hu> wrote:

> applied to tip/x86/mpparse, thanks.

-tip testing found an early 64-bit bootup crash:


SMP: Allowing 0 CPUs, 0 hotplug CPUs
PANIC: early exception 0e rip 10:ffffffff804aeb32 error 2 cr2 
ffff810040000000
Pid: 0, comm: swapper Not tainted 2.6.26-rc6 #8188

Call Trace:
 [<ffffffff80233f59>] ? printk+0x77/0x98
 [<ffffffff80d78196>] early_idt_handler+0x56/0x6a
 [<ffffffff804aeb32>] ? memset+0x32/0xc0
 [<ffffffff80d88026>] ? __alloc_bootmem_core+0x1ce/0x372
 [<ffffffff80d88343>] __alloc_bootmem_nopanic+0x35/0x60
 [<ffffffff80d8837f>] __alloc_bootmem+0x11/0x3a
 [<ffffffff80d7d329>] setup_per_cpu_areas+0x8d/0x249
 [<ffffffff80d78d61>] start_kernel+0x175/0x3a4
 [<ffffffff80d78365>] x86_64_start_kernel+0x165/0x16e

RIP 0x10

with this config (1GB RAM system):

  http://redhat.com/~mingo/misc/config-Thu_Jun_19_14_22_37_CEST_2008.bad

so i reverted this patch for now.

	Ingo
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