Bug 83114

Summary:	system won't boot with nosysinfo kernel parameter
Product:	[Retired] Red Hat Public Beta	Reporter:	Michael Young <m.a.young>
Component:	kernel	Assignee:	Arjan van de Ven <arjanv>
Status:	CLOSED RAWHIDE	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	phoebe	CC:	mitr
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:	2003-02-14 11:28:04 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:
Bug Blocks:	79578, 84225

Description Michael Young 2003-01-30 13:54:43 UTC

From Bugzilla Helper:
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Description of problem:
The release notes for phoebe2 say you can turn off NPTL thread support by
booting the kernel with the nosysinfo parameter. However if you try it, the
system hangs during the boot after the "freeing unused kernel memory" line. I
can reproduce this with the -2.21, -2.25, and -2.27 kernels.
Maybe this is because some program (maybe init) needs NPTL, but if you are going
to advertise it as an option, the system should at least boot.

How reproducible:
Always

Steps to Reproduce:
1.boot with the nosysinfo parameter.

Comment 1 Matt Wilson 2003-02-14 05:35:30 UTC

still present in 2.4.20-2.48

init   R
[<c010ac72>] do_IRQ [kernel] 0xa2 (0xc1925fa0))
[<c01171e0>] do_page_fault [kernel] 0x0 (0xc1925fb0))
[<c0109628>] error_code [kernel] 0x34 (0xc1925fb8))

Comment 2 Roland McGrath 2003-02-14 07:27:33 UTC

The bug is that nosysinfo disables the magic page without disabling
the AT_SYSINFO auxv element that causes libc to use the magic page.
So init crashes on its first glibc system call.

I have a kernel patch that fixes nosysinfo to disable AT_SYSINFO as well,
so it boots.  That patch should get merged in Real Soon Now.

Comment 3 Arjan van de Ven 2003-02-14 09:48:05 UTC

will remove nosysinfo

Comment 4 Ingo Molnar 2003-02-14 11:28:04 UTC

fix is in CVS, should show up in next rawhide.