Bug 691859 - setting isolcpus to a cpuset that covers all online cpus causes boot failure
Summary: setting isolcpus to a cpuset that covers all online cpus causes boot failure
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.2
Hardware: All
OS: All
medium
medium
Target Milestone: rc
: ---
Assignee: Neil Horman
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-03-29 17:09 UTC by Jeremy Eder
Modified: 2018-10-27 16:09 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-03-31 17:59:42 UTC
Target Upstream Version:

Attachments (Terms of Use)
patch to disable isolcpus with isolated cpu set covers all online cpus (654 bytes, patch)
2011-03-29 17:58 UTC, Neil Horman 		no flags Details | Diff
View All Add an attachment (proposed patch, testcase, etc.)

Comment 2 Neil Horman 2011-03-29 17:58:58 UTC 
Created attachment 488516 [details]
patch to disable isolcpus with isolated cpu set covers all online cpus

Please try this patch.  Its for an upstream kernel, but it should massage into rhel6 just fine. It will, instead of bughalting when the init task is migrated, will cause the non-isocpus set to be expanded, and a warning printed instead.
Comment 6 Neil Horman 2011-03-30 13:34:24 UTC 
Jeremy, any results?
Comment 9 Neil Horman 2011-03-31 15:14:11 UTC 
You're contradicting yourself.  Your list says that every kernel you tried failed with the stack trace in comment 0.
At the same time that you said that you can't make this problem occur on anything other than the 5.3 GOLD tree.  Which is it?  

Also, why are you testing with RHEL5?  This problem was reported against RHEL6.  Not that it shouldn't fix the problem in RHEL5 as well (assuming its there), but regardless.  Is the bz version incorrect?
Comment 11 Neil Horman 2011-03-31 17:59:42 UTC 
ok, then lets not waste time on it.
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