linux-kernel - Re: [Bug #10872] x86_64 boot hang when CONFIG

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Date:	Mon, 7 Jul 2008 08:32:18 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>
Subject: Re: [Bug #10872] x86_64 boot hang when CONFIG_NUMA=n


* Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> > This still happens with 2.6.26-rc9.  Using CONFIG_NUMA=y boots OK.
> 
> Ok, then it wasn't the nr_zones thing.
> 
> Since it seems to be repeatable for you, can you bisect it?

one guess would be:

| commit e8ee6f0ae5cd860e8e6c02807edfa3c1fa01bcb5
| Author: Yinghai Lu <yhlu.kernel@...il.com>
| Date:   Sun Apr 13 01:41:58 2008 -0700
|
|     x86: work around io allocation overlap of HT links

but ... since CONFIG_NUMA makes it work, i'm not sure about that.

Randy, could you post the full CONFIG_NUMA bootlog as well, does it show 
any difference in resource allocations?

	Ingo

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