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Bug 1704568

Summary: [RHEL-8.1] aarch64: Not able to save vmcore with kexec-tools Release 2.0.19-1
Product: Red Hat Enterprise Linux 8 Reporter: Bhupesh Sharma <bhsharma>
Component: kexec-toolsAssignee: Bhupesh Sharma <bhsharma>
Status: CLOSED DUPLICATE QA Contact: Kernel General QE <kernel-general-qe>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 8.1CC: bhsharma, jfeeney, kdump-bugs, ruyang, zsun
Target Milestone: rc   
Target Release: 8.0   
Hardware: aarch64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
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Clone Of: Environment:
Last Closed: 2019-04-30 19:54:14 UTC Type: Bug
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Bhupesh Sharma 2019-04-30 05:26:10 UTC 
Description of problem:
Not able to save vmcore with kexec-tools Release 2.0.19-1 on aarch64 architecture.

Version-Release number of selected component (if applicable):
kexec-tools Release 2.0.19-1

# uname -rn
hpe-apollo-cn99xx-03.khw3.lab.eng.bos.redhat.com 4.18.0-80.20.el8.aarch64

How reproducible:

# kdumpctl restart
# echo c > /proc/sysrq-trigger

Actual results:

Crashkernel logs:
-----------------

Starting Kdump Vmcore Save Service... 
kdump: dump target is /dev/mapper/rhel_hpe--moonshot--02--c09-root 
kdump: saving to /sysroot//var/crash/127.0.0.1-2019-04-29-05:00:02/ 
kdump: saving vmcore-dmesg.txt 
kdump: saving vmcore-dmesg.txt complete 
kdump: saving vmcore 
kdump: saving vmcore failed 

[FAILED] Failed to start Kdump Vmcore Save Service. 
See 'systemctl status kdump-capture.service' for details. 

Expected results:

vmcore is saved properly.
Comment 2 Bhupesh Sharma 2019-04-30 05:31:03 UTC 
I think these failures are a result of the RHEL-8.1 kexec-tools being rebased to latest makedumpfile release. While rebasing seems we left out the ARMv8.2 LVA (52-bit User-space changes) that were applied as RHEL only fix for RHEL-8.0
I have prepared a patch for adding this to RHEL-8.1 as a RHEL-only patch, till we have some conclusion on the upstream solution posted for the same.

I will post a patch for the same shortly.

With the fix I am able to obtain vmcore successfully on ampere-osprey and hpe-apollo machine successfully.
Here is the brew build for the same <https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=21356030>