linux-kernel - Re: [PATCH] Make Intel 8-way Xeons boot again

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Message-Id: <1263246829.2859.537.camel@sbs-t61.sc.intel.com>
Date:	Mon, 11 Jan 2010 13:53:49 -0800
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	"ananth@...ibm.com" <ananth@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Subject: Re: [PATCH] Make Intel 8-way Xeons boot again

On Mon, 2010-01-11 at 13:43 -0800, Yinghai Lu wrote:
> On Sun, Jan 10, 2010 at 2:26 AM, Ingo Molnar <mingo@...e.hu> wrote:
> >
> > In any case this commit needs to be reverted as the assumption that it's safe
> > to do this optimization is evidently not true.
> >
> 
> use attached debug patch on one of my intel system and with nr_cpus=8,
> it seems logical flat works.
> that system BSP apic id is 0x20.

Same here. I don't see any issues with my testing on two different
platforms.

This sounds more like an IBM platform issue. So reverting the 2fbd07a5f
commit is not the correct solution.

thanks,
suresh

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