linux-kernel - Re: Linux 2.6.23-rc4, maxcpus=1 regression

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Date:	Tue, 28 Aug 2007 21:03:16 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Len Brown <lenb@...nel.org>, Hugh Dickins <hugh@...itas.com>
Subject: Re: Linux 2.6.23-rc4, maxcpus=1 regression



On Wed, 29 Aug 2007, Ingo Molnar wrote:
> 
> maxcpus=1 fails to boot on my T60 laptop, it hangs in early bootup 
> (right after setting up the local APICs). I bisected it down to this 
> recent commit:
> 
> | commit 61ec7567db103d537329b0db9a887db570431ff4
> | Author: Len Brown <len.brown@...el.com>
> | Date:   Thu Aug 16 03:34:22 2007 -0400
> |
> |     ACPI: boot correctly with "nosmp" or "maxcpus=0"
> 
> reverting that commit makes the system boot again. I've attached the 
> .config.

Did you try -rc4? Commit 813409771731d80e6fa94199adf99f2269a4afc0 in 
particular ("fix maxcpus=N parsing") was supposed to fix that commit.

		Linus
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