Bug 83114 - system won't boot with nosysinfo kernel parameter
Summary: system won't boot with nosysinfo kernel parameter
Status: CLOSED RAWHIDE
Alias: None
Product: Red Hat Public Beta
Classification: Retired
Component: kernel (Show other bugs)
(Show other bugs)
Version: phoebe
Hardware: i386 Linux
medium
medium
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
URL:
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Keywords:
Depends On:
Blocks: 79578 84225
TreeView+ depends on / blocked
 
Reported: 2003-01-30 13:54 UTC by Michael Young
Modified: 2007-04-18 16:50 UTC (History)
1 user (show)

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: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Michael Young 2003-01-30 13:54:43 UTC 
From Bugzilla Helper:
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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 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.
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