Bug 62117

Summary: Smp kernel sees only one of 4 slimmerlot cpu's with multiple pci cards
Product: [Retired] Red Hat Linux Reporter: Clay Cooper <clay_cooper>
Component: kernelAssignee: Arjan van de Ven <arjanv>
Status: CLOSED RAWHIDE QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.3CC: afom_m, dale_kaisner, danny_trinh, dean_oliver, gary_lerhaupt, john_hull, joshua_giles, matt_domsch, michael_e_brown, robert_hentosh, rogelio_noriega
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2002-03-27 19:12:02 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
pirq output of configuration that incorrectly sees 1 cpu
none
mptable output of configuration that incorrectly sees 1 cpu
none
pirq output of configuration that correctly sees 8 logical cpu's (hyperthreading enabled)
none
mptable output of configuration that correctly sees 8 logical cpu's (hyperthreading enabled)
none
ksymoops output of oopsing configuration none

Description Clay Cooper 2002-03-27 17:19:43 UTC
From Bugzilla Helper:
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Description of problem:
On a slimmerlot with hampton beta3 installed (2.4.18-0.4smp), w/ bios A02, 1GB
ram, 2GB swap, and LSI 22320 as boot device...

3 different configurations give 3 different results:

22320 in slot 2, Perc3QC in slot 3 (with PV210S attached), Perc3DCL in slot 4,
1000XT in slot 5, Dual Pro 100 in slot 6, Pro 100 in slot 7 -- smp kernel only
sees 1 of 4 cpu's

Remove nics from slots 6 and 7 and kernel oops during cpu detection

Then remove Perc3QC and DCL also (leaving 22320 and 1000XT) and 4 cpu's are
correctly detected.

Each of these three results are reproducible everytime.

Same results with hyperthreading (logical processors) enabled or disabled in
bios.  Of course, in the working configuration, 4 or 8 processors are seen
depending on the setting.

Attaching mptable and pirq output from the two configurations that boot, and
ksymoops output from oopsing configuration.



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


How reproducible:
Always

Steps to Reproduce:
1.Install hampton beta3 on a slimmerlot with listed configuration
2.Note oops or incorrect cpu detection depending on configuration
3.
	

Actual Results:  Incorrect cpu detection or oops

Expected Results:  Correct cpu detection

Additional info:

Comment 1 Clay Cooper 2002-03-27 17:22:12 UTC
Created attachment 50905 [details]
pirq output of configuration that incorrectly sees 1 cpu

Comment 2 Clay Cooper 2002-03-27 17:22:59 UTC
Created attachment 50907 [details]
mptable output of configuration that incorrectly sees 1 cpu

Comment 3 Clay Cooper 2002-03-27 17:24:18 UTC
Created attachment 50908 [details]
pirq output of configuration that correctly sees 8 logical cpu's (hyperthreading enabled)

Comment 4 Clay Cooper 2002-03-27 17:25:20 UTC
Created attachment 50910 [details]
mptable output of configuration that correctly sees 8 logical cpu's (hyperthreading enabled)

Comment 5 Clay Cooper 2002-03-27 17:26:13 UTC
Created attachment 50911 [details]
ksymoops output of oopsing configuration

Comment 6 Matt Domsch 2002-03-27 17:46:29 UTC
This is because the 2.4.18-0.4 kernel on beta3 does not include the MP 
Table "MAX_MP_BUSSES" overflow bug fix which kills Merlot/SlimMerlot.

The latest rawhide kernel 2.4.18-0.10 does have the fix.  Clay, please try this.

So, I think this is a duplicate of #60754, which claims to have been fixed for 
beta3, but clearly wasn't.


Comment 7 Clay Cooper 2002-03-27 19:11:57 UTC
Tried 2.4.18-0.10smp with all 6 pci cards in the machine and received expected
behaviour.  Thanks.