Bug 60057

Summary:	[hampton beta1] virtual memory reservation harmless printk on bootup
Product:	[Retired] Red Hat Linux	Reporter:	Wendy Hung <wendyh>
Component:	kernel	Assignee:	Arjan van de Ven <arjanv>
Status:	CLOSED RAWHIDE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.3
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2002-04-02 15:03:25 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Wendy Hung 2002-02-19 16:11:01 UTC

How reproducible:
Always

Steps to Reproduce:
	
1) install hampton on machine (smp kernel)
2) reboot
3) check /var/log/messages for "reserved twice" messages.


Actual Results:  Feb 14 11:19:19 localhost syslogd 1.4.1: restart.
Feb 14 11:19:19 localhost syslog: syslogd startup succeeded
Feb 14 11:19:19 localhost syslog: klogd startup succeeded
Feb 14 11:19:19 localhost kernel: klogd 1.4.1, log source = /proc/kmsg started.
Feb 14 11:19:19 localhost kernel: Inspecting /boot/System.map-2.4.17-0.13smp
Feb 14 11:19:19 localhost portmap: portmap startup succeeded
Feb 14 11:19:20 localhost kernel: Loaded 16557 symbols from /boot/System.map-
2.4.17-0.13smp.
Feb 14 11:19:20 localhost kernel: Symbols match kernel version 2.4.17.
Feb 14 11:19:20 localhost kernel: Loaded 198 symbols from 10 modules.
Feb 14 11:19:20 localhost kernel: Linux version 2.4.17-0.13smp 
(bhcompile.redhat.com) (gcc version 2.96 20000731 (Red Hat Linux 7.2 
2.96-102)) #1 SMP Fri Feb 1 10:30:48 EST 2002
Feb 14 11:19:20 localhost kernel: BIOS-provided physical RAM map:
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 0000000000000000 - 
000000000009e000 (usable)
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 000000000009e000 - 
00000000000a0000 (reserved)
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 00000000000e0000 - 
0000000000100000 (reserved)
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 0000000000100000 - 
000000003fff8900 (usable)
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 000000003fff8900 - 
0000000040000000 (ACPI data)
Feb 14 11:19:20 localhost kernel:  BIOS-e820: 00000000fec00000 - 
0000000100000000 (reserved)
Feb 14 11:19:20 localhost kernel: 127MB HIGHMEM available.
Feb 14 11:19:20 localhost rpc.statd[665]: Version 0.3.3 Starting
Feb 14 11:19:20 localhost nfslock: rpc.statd startup succeeded
Feb 14 11:19:20 localhost kernel: found SMP MP-table at 0009e140
Feb 14 11:19:20 localhost rc: Starting keytable:  succeeded
Feb 14 11:19:20 localhost kernel: hm, page 0009e000 reserved twice.
Feb 14 11:19:20 localhost kernel: hm, page 0009f000 reserved twice.
Feb 14 11:19:20 localhost kernel: hm, page 0009e000 reserved twice.
Feb 14 11:19:20 localhost random: Initializing random number generator:  
succeeded
Feb 14 11:19:20 localhost kernel: hm, page 0009f000 reserved twice.
Feb 14 11:19:20 localhost kernel: WARNING: MP table in the EBDA can be UNSAFE, 
contact linux-smp.org if you experience SMP problems!
Feb 14 11:19:20 localhost kernel: On node 0 totalpages: 262136
Feb 14 11:19:20 localhost kernel: zone(0): 4096 pages.
Feb 14 11:19:20 localhost kernel: zone(1): 225280 pages.
Feb 14 11:19:20 localhost kernel: zone(2): 32760 pages.
Feb 14 11:19:20 localhost kernel: Intel MultiProcessor Specification v1.4
Feb 14 11:19:20 localhost kernel:     Virtual Wire compatibility mode.
Feb 14 11:19:21 localhost kernel: OEM ID: IBM ENSW Product ID: Mohawk  SMP  
APIC at: 0xFEE00000
Feb 14 11:19:21 localhost kernel: Processor #3 Pentium(tm) Pro APIC version 17
Feb 14 11:19:21 localhost kernel: Processor #0 Pentium(tm) Pro APIC version 17
Feb 14 11:19:21 localhost netfs: Mounting other filesystems:  succeeded
Feb 14 11:19:21 localhost kernel: Processor #1 Pentium(tm) Pro APIC version 17
Feb 14 11:19:21 localhost kernel: Processor #2 Pentium(tm) Pro APIC version 17
Feb 14 11:19:21 localhost kernel: I/O APIC #14 Version 17 at 0xFEC00000.
Feb 14 11:19:21 localhost kernel: I/O APIC #13 Version 17 at 0xFEC01000.
Feb 14 11:19:21 localhost kernel: Processors: 4


Additional info:

Affects multiprocessor machines (verified on IBM xSeries 240, 250, 342).

Comment 1 Wendy Hung 2002-02-19 16:50:52 UTC

Can you verify that this is a BIOS bug and just a warning?

Comment 2 Arjan van de Ven 2002-02-19 17:13:04 UTC

It is just a warning. And to be honest, I'm not 100% convinced it's a bios bug;
I see waaay to much of it......
could well be a "just to be sure" thing in the early boot code (eg to work
around bios bugs of other machines)

Comment 3 Wendy Hung 2002-03-20 19:11:01 UTC

Also seen on Pensacola Beta2.

Comment 4 Alan Cox 2002-03-28 10:55:59 UTC

Page reserved twice is coming from the bootmem code. Its a genuine bug in the
kernel code looking through the SMP boot handling. Fortunately its a harmless
(and over zealous) sanity check, nothing worse.

Comment 5 Wendy Hung 2002-05-06 18:58:11 UTC

Fixed in RH 7.3 Gold Master (Valhalla).