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Bug 81575 - kernel 2.4.18-19.7.x (bigmem) hangs at boot
Summary: kernel 2.4.18-19.7.x (bigmem) hangs at boot
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 7.2
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2003-01-10 17:05 UTC by David Thompson
Modified: 2007-04-18 16:49 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2004-09-30 15:40:23 UTC

Attachments (Terms of Use)
kernel output preceeding hang (8.61 KB, text/plain)
2003-01-10 17:14 UTC, David Thompson
no flags Details

Description David Thompson 2003-01-10 17:05:00 UTC
Description of problem:

Upgrading a 7.2 computer to kernel-bigmem-2.4.18-19.7.x caused hard hang at boot.

Version-Release number of selected component (if applicable):
kernel-bigmem-2.4.18-19.7.x (i686)
This is with a SuperMicro P4DP6 Dual Xeon with one CPU, hyperthreading dusabled,
8 GB memory

How reproducible:

Steps to Reproduce:
1. Boot.
Actual results:

Expected results:

Additional info:
See attached boot log.

Comment 1 David Thompson 2003-01-10 17:14:28 UTC
Created attachment 89288 [details]
kernel output preceeding hang

This gives all the output the kernel produces.	After this, all I can do is
press the reset button (CTRL-ALT-DEL is innefective, but also disabled in our
inittab).  The timestamps are from our serial console server program. 
Sometimes the hang occurs a line or two earlier or later than this.

Comment 2 Charles R. Anderson 2003-01-19 01:50:27 UTC
I get a hang at the same exact point with 2.4.18-19.7.xsmp on a Dell PowerEdge
1550 (dual PIII with only a single 866 MHz CPU installed, 256MB RAM).  I did try
the non-SMP 2.4.18-19.7.x, and it does boot, however interrupt routing is
suboptimal, with the aic7xxx controller running on IRQ 3 (after complaining
about an interrupt conflict).  For now I've reverted to 2.4.9-34enterprise.

Comment 3 Charles R. Anderson 2003-01-19 02:09:24 UTC
This sounds like the same hang as in Bug 76829.  The hang there is in the same
place, only displaying the first 'p' in the last line below:

VFS: Diskquotas version dquot_6.5.0 initialized
Detected PS/2 Mouse Port.
pty: 2048 Unix98 ptys configured

Comment 4 Don Bodle 2003-03-13 13:42:46 UTC
I have the same problem on an IBM x345, single XEON with HT enabled, 4GB 
memory, kernel 2.4.18-26.8.0 from RH8.0 errata.  donald_bodle@reyrey.com.  
Hangs either at the ptys: statement, or once I got "serial driver version 
5.05c (2001-07-08) wit" as the incomplete next line.  The UP kernel boots fine.

Comment 5 David Thompson 2003-03-13 14:02:28 UTC
Yeah, I restested this with a slightly re-spun 2.4.18-26.7.x bigmem kernel.  The
problem only appears with a single CPU.  With 2 CPUs, all is fine.

Apparently, there is something in the bigmem code path that fails if multiple
CPUs are not present.


Comment 6 Don Bodle 2003-03-13 17:38:39 UTC
I did discover that HT had been disabled on the x345 I was testing on.  With 
HT enabled on a single CPU box, the 2.4.18-26.8.0 smp and bigmem kernels both 
booted okay.
Don Bodle

Comment 7 Per Hedeland 2003-03-22 00:21:40 UTC
You may want to cross-check also with bug 78559 - I just posted a comment
there. I am *not* using bigmem, but get the hang at the "pty" on a number
of UP systems when booting 2.4.18-26.7.x SMP - 2.4.18-26.7.x UP works fine,
as does 2.4.18-10 SMP. Since you too seem to have the problem with the SMP
kernel on UP systems, perhaps the bigmem is not the critical factor - also
the mod I did (which fixes / works around the problem for me) wasn't
related to bigmem.

--Per Hedeland

Comment 8 Don Bodle 2003-04-30 19:52:22 UTC
I haven't been back to this in a while, but wanted to note that if you look at 
the Redhat configs used to generate the smp and bigmem kernels, both have SMP 
enabled.  So the problem with the bigmem kernel is likely still an SMP issue.

Comment 9 Bugzilla owner 2004-09-30 15:40:23 UTC
Thanks for the bug report. However, Red Hat no longer maintains this version of
the product. Please upgrade to the latest version and open a new bug if the problem

The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, 
and if you believe this bug is interesting to them, please report the problem in
the bug tracker at: http://bugzilla.fedora.us/

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