Bug 83114 - system won't boot with nosysinfo kernel parameter
Summary: system won't boot with nosysinfo kernel parameter
Alias: None
Product: Red Hat Public Beta
Classification: Retired
Component: kernel
Version: phoebe
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
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:
Clone Of:
Last Closed: 2003-02-14 11:28:04 UTC

Attachments (Terms of Use)

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:

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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