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Bug 39864

Summary:	Kernel panic when using apend mem=xxxM
Product:	[Retired] Red Hat Linux	Reporter:	David Revor <david_revor>
Component:	kernel	Assignee:	Ingo Molnar <mingo>
Status:	CLOSED NOTABUG	QA Contact:	Brock Organ <borgan>
Severity:	high	Docs Contact:
Priority:	medium
Version:	7.1	CC:	ljeoffroi
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:	2001-05-30 14:41:47 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:
Bug Depends On:	36940
Bug Blocks:

Description David Revor 2001-05-09 13:59:56 UTC

From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; Win 9x 4.90; 
NetCaptor 6.2.1A)

Description of problem:
On a compaq proliant 4500 the installer doesn't see enough memory to run 
so I adjusted the memory like I have for previous vers. The kernel panics 
with "VFS: cannot mount root device on 8:35". I have 512M in the system so 
I started with mem=512M then I tuned it down some knowing sometimes you 
have to go 1 less ie mem=511M. Still got a panic. Note: this box is NOT on 
the hardware list.

How reproducible:
Always

Steps to Reproduce:
1.from installation welcome screen type "linux mem=512M <cr>"
2.
3.
	

Actual Results:  Kernel panic

Expected Results:  Installtion should continue as normal with the kernel 
being able to utilize all available memory

Additional info:

Comment 1 Need Real Name 2001-05-09 20:29:08 UTC

I have the same problem with a Compaq 2500R.

Comment 2 Arjan van de Ven 2001-05-09 20:34:13 UTC

Ingo: could you add an example of exactmap for a 64Mb machine here ?

Comment 3 Arjan van de Ven 2001-05-11 08:38:49 UTC

Please look at bug 36940 for the commandline option to work around this.