Kdump fails on IBM POWER system when crash is triggered after CPU/memory Add/Remove operation
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SUSE Linux Enterprise Server 15 SP 2
SUSE Linux Enterprise Server 15 SP 1
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12 SP 5
SUSE Linux Enterprise Server 12 SP 4
SUSE Linux Enterprise Server 12 SP 3
systemctl restart kdump.service
The kdump reload command (`kexec -p`) parses through device-tree nodes to get the CPU topology. Some of these nodes are removed when CPUs are hot-removed.
A race condition between kdump reload & CPUs hot-removal can cause kdump load to fail so a subsequent crash would not capture the dump.
When memory is hot-removed/hot-added, the udev rule to reload capture kernel is triggered while device-tree is being updated.
At times, it results in capture kernel looking at stale memory mapping and failing to save its dump to disk.
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- Document ID:7023750
- Creation Date: 27-Feb-2019
- Modified Date:19-May-2021
- SUSE Linux Enterprise Server
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