linux-kernel - Re: Suspected regression in "x86: extend e820 ealy

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Message-ID: <4834AF0C.2000601@goop.org>
Date:	Thu, 22 May 2008 00:23:56 +0100
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Yinghai Lu <yhlu.kernel@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>,
	kernel list <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: Suspected regression in "x86: extend e820 ealy_res support 32bit"

Yinghai Lu wrote:
> noticed that bootmap_size is shifted already...
>
> please use attached patch to see if bootmap is right...
>   

Unfortunately its a bit difficult because printk() output isn't 
appearing at early boot (not sure why).  I'll try to extract something 
useful tomorrow.

Perhaps this is helpful:

This the e820 map of a regular boot:

BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 000000000009f000 (usable)
 Xen: 0000000000100000 - 0000000010000000 (usable)
debug: ignoring loglevel setting.
 limit_regions start: 0000000000000000 - 000000000009f000 (usable)
 limit_regions start: 0000000000100000 - 0000000010000000 (usable)
 limit_regions endfunc: 0000000000000000 - 000000000009f000 (usable)
 limit_regions endfunc: 0000000000100000 - 0000000010000000 (usable)
user-defined physical RAM map:
 user: 0000000000000000 - 000000000009f000 (usable)
 user: 0000000000100000 - 0000000010000000 (usable)
0MB HIGHMEM available.
256MB LOWMEM available.
[...]
Entering add_active_range(0, 0, 65536) 0 entries of 256 used
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->    65536
  HighMem     65536 ->    65536
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
    0:        0 ->    65536
On node 0 totalpages: 65536
  DMA zone: 56 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 4040 pages, LIFO batch:0
  Normal zone: 840 pages used for memmap
  Normal zone: 60600 pages, LIFO batch:15
  HighMem zone: 0 pages used for memmap
  Movable zone: 0 pages used for memmap


.config attached.

    J

View attachment ".config" of type "text/plain" (55465 bytes)