Bug 84013 - AS 2.1 kernel hangs during boot, on generic (non-numaq) systems with more than 8 CPUs.
AS 2.1 kernel hangs during boot, on generic (non-numaq) systems with more tha...
Status: CLOSED WONTFIX
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: kernel (Show other bugs)
2.1
i386 Linux
medium Severity high
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Assigned To: Larry Woodman
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Depends On: 84502
Blocks:
  Show dependency treegraph
 
Reported: 2003-02-10 18:13 EST by Venkatesh Pallipadi
Modified: 2007-11-30 17:06 EST (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Clone Of:
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Last Closed: 2003-04-22 15:46:50 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Patch to support generic (non-numaq) > 8 CPU system, with summit kernel (408 bytes, patch)
2003-02-10 18:16 EST, Venkatesh Pallipadi
no flags Details | Diff

  None (edit)
Description Venkatesh Pallipadi 2003-02-10 18:13:29 EST
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)

Description of problem:

On generic (non-numaq) systems with 8 physical P4s (16 logical), AS 2.1 kernel 
panic()s during boot, complaining about 
"Max APIC ID exceeded!".
The system has 16 - logical processors and 4 IO-APICs.



Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Try booting AS 2.1 kernel on this system, the system panic()s
2.Also tried running AS 2.1 summit kernel on this system. That too fails at 
the same stage.
3.
    

Actual Results:  panic()

Expected Results:  normal boot of the system.

Additional info:
Comment 1 Venkatesh Pallipadi 2003-02-10 18:16:28 EST
Created attachment 89982 [details]
Patch to support generic (non-numaq) > 8 CPU system, with summit kernel
Comment 2 Venkatesh Pallipadi 2003-02-10 18:17:25 EST
A simple patch on AS 2.1 summit kernel boots up the above system. With this 
patch summit kernel can be used to support such systems.

The patch on top of AS 2.1 summit tree is attached.
Comment 3 Arjan van de Ven 2003-02-10 18:19:54 EST
Red Hat Linux AS2.1 does not support more than 8 CPU's.
Comment 4 Larry Troan 2003-04-22 15:46:50 EDT
If this is a request for future products to support more than 8 CPUs, please
work with Keve Gabbert to submit through proper channels.

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