linux-kernel - Re: [stable] 2.6.23 boot failures on x86-64.

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Message-ID: <20071029195249.GA21225@linux-os.sc.intel.com>
Date:	Mon, 29 Oct 2007 12:52:49 -0700
From:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Greg KH <greg@...ah.com>, Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Martin Ebourne <fedora@...urne.me.uk>,
	Zou Nan hai <nanhai.zou@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Andi Kleen <ak@...e.de>, stable@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <clameter@....com>,
	Andy Whitcroft <apw@...dowen.org>, Mel Gorman <mel@....ul.ie>
Subject: Re: [stable] 2.6.23 boot failures on x86-64.

On Mon, Oct 29, 2007 at 11:37:40AM -0700, Linus Torvalds wrote:
> 
> 
> On Mon, 29 Oct 2007, Greg KH wrote:
> > 
> > I'll be glad to revert it in -stable, if it's also reverted in Linus's
> > tree first :)
> 
> We've had some changes since 2.6.23, and afaik, the 
> "alloc_bootmem_high_node()" code is alreadt effectively dead there. It's 
> only called if CONFIG_SPARSEMEM_VMEMMAP is *not* enabled, and I *think* we 
> enable it by force on x86-64 these days.

If so, we(Nanhai and myself) will take a look at VMEMMAP changes and see if
the bug that the commit 2e1c49db4c640b35df13889b86b9d62215ade4b6 tries to fix is
still open in the latest git.

But I can't explain how 2e1c49db4c640b35df13889b86b9d62215ade4b6 can be
the root cause of Dave's issue in 2.6.23.

thanks,
suresh
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