Bug 83114 – system won't boot with nosysinfo kernel parameter

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Bug 83114 - system won't boot with nosysinfo kernel parameter

Summary:	system won't boot with nosysinfo kernel parameter

Status:	CLOSED RAWHIDE

Aliases:	None

Product:	Red Hat Public Beta
Classification:	Retired
Component:	kernel (Show other bugs)
Sub Component:
Version:	phoebe
Hardware:	i386 Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Arjan van de Ven
QA Contact:	Brian Brock
Docs Contact:

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Depends On:
Blocks:	79578 84225
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Reported:	2003-01-30 08:54 EST by Michael Young
Modified:	2007-04-18 12:50 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2003-02-14 06:28:04 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:

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Description Michael Young 2003-01-30 08:54:43 EST

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; SunOS sun4u; en-US; rv:1.0.1) Gecko/20020921
Netscape/7.0

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 00:35:30 EST

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 02:27:33 EST

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 04:48:05 EST

will remove nosysinfo

Comment 4 Ingo Molnar 2003-02-14 06:28:04 EST

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

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