linux-kernel - Re: [PATCH/RFT 0/13] x86: unify vmlinux.lds

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Message-ID: <20090429105056.GA28720@uranus.ravnborg.org>
Date:	Wed, 29 Apr 2009 12:50:56 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>, Tim Abbott <tabbott@....EDU>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH/RFT 0/13] x86: unify vmlinux.lds

On Wed, Apr 29, 2009 at 12:00:13PM +0200, Ingo Molnar wrote:
> 
> Ok, first problem hit in testing:
> 
> Freeing unused kernel memory: 1800k freed
> BUG: Bad page state in process swapper  pfn:01c00
> page:f666b000 flags:00840000 count:0 mapcount:0 mapping:(null) index:0
> Pid: 1, comm: swapper Not tainted 2.6.30-rc3-tip-01696-g9b182a3-dirty #37518
> Call Trace:
>  [<c08730d0>] ? printk+0x15/0x1d
>  [<c01aa0bb>] bad_page+0xdb/0x150
>  [<c01abba7>] free_hot_cold_page+0x1b7/0x2f0
>  [<c01abd4f>] free_hot_page+0xf/0x20
>  [<c01abd97>] __free_pages+0x37/0x40
>  [<c01abddf>] free_pages+0x3f/0x50
>  [<c011b8c0>] free_init_pages+0xb0/0xd0
>  [<c011b8fc>] free_initmem+0x1c/0x20
>  [<c01011d2>] init_post+0x12/0x170
>  [<c0c142f3>] kernel_init+0x14b/0x161
>  [<c0c141a8>] ? kernel_init+0x0/0x161
>  [<c0103be7>] kernel_thread_helper+0x7/0x10
> Disabling lock debugging due to kernel taint
> Write protecting the kernel text: 7660k
> Testing CPA: Reverting c0100000-c087b000
> 
> more details attached. (sendig the System.map separately, it's too 
> large) Commit used was v2.6.30-rc3-1696-g9b182a3.

OK - I think I know what is wrong.
You have:

CONFIG_RELOCATABLE=y

And I moved a few symbols out of an output section.
But they were there for a purpose as the comment in the top of
the file says.

I am on my way out of the door.
Patch follows tonight.

	Sam
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