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Bug 165113

Summary: kernel build broken when 4KSTACKS disabled
Product: Red Hat Enterprise Linux 4 Reporter: Neil Horman <nhorman>
Component: kernelAssignee: Neil Horman <nhorman>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: jbaron, smithj4, snitzer, tao
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: RHSA-2006-0575 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2006-08-10 21:13:34 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 181409    
Attachments:
Description Flags
patch to fix build break none

Description Neil Horman 2005-08-04 14:01:21 UTC 
Description of problem:
RHEL4 kernel will not build when CONFIG_4KSTACKS=n

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

How reproducible:
always 

Steps to Reproduce:
1.install RHEL4 kernel src rpm
2.modify the selected pre-written config so that 4KSTACKS=n
3.build the kernel
  
Actual results:
build break

Expected results:
no build break

Additional info:
This seems to be caused by the fact that we failed to surround some irq
switching code in smp_apic_timer_interrupt and in crashdump.h with ifdef
CONFIG_4KSTACKS, as all the other stack switching code does.  While we don't
support rebuilding the kernel, conditioning this code on the CONFIG_4KSTACKS
directive does seem to be the right thing to do.
Comment 1 Neil Horman 2005-08-04 14:01:21 UTC 
Created attachment 117447 [details]
patch to fix build break
Comment 6 Mike Snitzer 2005-10-21 21:44:49 UTC 
Will there be a forthcoming kernel update from RedHat that includes this fix?
Comment 8 Jason Smith 2005-12-29 22:47:45 UTC 
We are also experiencing problems with stacked drivers & the 4kSTACKS limit that
causes kernel crashes from stack overflows under certain setups, conditions &
load.  I also need to use this patch to configure 8k kernel stacks.  Will this
be added to a future kernel update anytime soon?
Comment 10 Jason Baron 2006-04-09 22:02:21 UTC 
committed in stream U4 build 34.15. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 13 Mike Gahagan 2006-06-01 14:16:11 UTC 
Verified compile breakage in -34.EL :

In file included from include/asm/diskdump.h:30,
                 from kernel/dump.c:35:
include/asm/crashdump.h: In function `platform_init_stack':
include/asm/crashdump.h:51: error: invalid application of `sizeof' to incomplet
e type `irq_ctx'
....

Sucessfully built an i386 (make bzImage) kernel with 2.6.9-37.EL after turning
off 4KSTACKS.
Comment 15 Red Hat Bugzilla 2006-08-10 21:13:34 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2006-0575.html