Bug 1404098 - makedumpfile with nr_cpus=16 and -d 15 freezes sometime
Summary: makedumpfile with nr_cpus=16 and -d 15 freezes sometime
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: kexec-tools
Version: 7.3
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: rc
: 7.4
Assignee: Pratyush Anand
QA Contact: Qiao Zhao
URL:
Whiteboard:
Depends On:
Blocks: 1299988 1473055
TreeView+ depends on / blocked
 
Reported: 2016-12-13 03:47 UTC by Pratyush Anand
Modified: 2017-07-31 02:45 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-07-31 02:45:39 UTC
Target Upstream Version:

Attachments (Terms of Use)
Console log of the machine where makedumpfile failed with -d 15 (860.60 KB, text/plain)
2016-12-13 03:47 UTC, Pratyush Anand 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)


Links
System ID Private Priority Status Summary Last Updated
IBM Linux Technology Center 149941 0 None None None 2016-12-14 15:15:38 UTC

Description Pratyush Anand 2016-12-13 03:47:21 UTC 
Created attachment 1231021 [details]
Console log of the machine where makedumpfile failed with -d 15

Description of problem:

(1) Machine used:  ibm-x3950x6-01.rhts.eng.pek2.redhat.com (4T memory and 192 cpus)
(2) RHEL version:  RHEL-7.4-20161123.n.0 Server x86_64
(3) Passed nr_cpus = 16 in /etc/sysconfig/kdump: KDUMP_COMMANDLINE_APPEND
and used makedumpfile as `makedumpfile -l --message-level 1 -d 15`  which did not complete. It freezed after 16% of dump copy. Machine could be recovered only after power cycle.
However, with nr_cpus = 1, same makedumpfile did succeed.

Teste beaker job is: https://beaker.engineering.redhat.com/jobs/1612054

Console log is: http://beaker-archive.app.eng.bos.redhat.com/beaker-logs/2016/11/16120/1612054/3291557/console.log

Version-Release number of selected component (if applicable):
RHEL-7.4-20161123.n.0 Server x86_64

How reproducible:
Random

Actual results:
makedumpfile freeze

Expected results:
makedumpfile should pass with -d 15 when nr_cpus = 16.
Note You need to log in before you can comment on or make changes to this bug.