linux-kernel - Re: [regression?] [resend] Memory zone info seems incomplete in boottime dmesg output

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Date:	Thu, 14 Aug 2008 21:08:46 +0200 (CEST)
From:	Sven Wegener <sven.wegener@...aler.net>
To:	Frans Pop <elendil@...net.nl>
cc:	linux-kernel@...r.kernel.org,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [regression?] [resend] Memory zone info seems incomplete in
 boottime dmesg output

On Thu, 14 Aug 2008, Frans Pop wrote:

> With 2.6.26 I get:
> <snip>
> Zone PFN ranges:
>   DMA             0 ->     4096
>   DMA32        4096 ->  1048576
>   Normal    1048576 ->  1048576
> Movable zone start PFN for each node
> early_node_map[4] active PFN ranges
>     0:        0 ->      159
>     0:      256 ->   521844
>     0:   521961 ->   521964
>     0:   521983 ->   521984
> On node 0 totalpages: 521751
>   DMA zone: 56 pages used for memmap
>   DMA zone: 1271 pages reserved
>   DMA zone: 2672 pages, LIFO batch:0
>   DMA32 zone: 7081 pages used for memmap
>   DMA32 zone: 510671 pages, LIFO batch:31
>   Normal zone: 0 pages used for memmap
>   Movable zone: 0 pages used for memmap
> </snip>
> 
> With 2.6.27-rc1 I only get pages listed for 2 zones (bottom part):
> <snip>
> Zone PFN ranges:
>   DMA      0x00000000 -> 0x00001000
>   DMA32    0x00001000 -> 0x00100000
>   Normal   0x00100000 -> 0x00100000
> Movable zone start PFN for each node
> early_node_map[4] active PFN ranges
>     0: 0x00000000 -> 0x0000009f
>     0: 0x00000100 -> 0x0007f674
>     0: 0x0007f6e9 -> 0x0007f6ec
>     0: 0x0007f6ff -> 0x0007f700
> On node 0 totalpages: 521751
>   DMA zone: 2072 pages, LIFO batch:0
>   DMA32 zone: 506625 pages, LIFO batch:31
> </snip>
> 
> Note that totalpages is the same and that for 2.6.26 the sum of pages for 
> all listed zones is equal to totalpages. Seems we've lost useful info 
> here.

Could you make sure DEBUG_MEMORY_INIT is activated (it should, if you've 
not chosen the embedded feature) and boot with mminit_loglevel=3 and see 
if you get the ouput you want.

Sven
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