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update 98-kexec rules for crash hotplug

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Resolves: RHEL-101854
Upstream: kdump-utils

commit 659e0aae8f00570c85e82e1317153bf89e59929c
Author: Baoquan He <bhe@redhat.com>
Date:   Thu Sep 7 10:37:20 2023 -0500

    update 98-kexec rules for crash hotplug

    In kernel, with the support of cpu/memory hotplug on crash, kdump
    reloading only needs to update the elfcorehdr.

    To realize the benefits, we need prevent udev from updating kdump
    kernel on hot un/plug changes when detecting that the crash_hotplug
    sysfs nodes are present.

    Link: https://lore.kernel.org/lkml/20230814214446.6659-1-eric.devolder@oracle.com/
    Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d68b4b6f307d155475cce541f2aee938032ed22e
    Signed-off-by: Baoquan He <bhe@redhat.com>

Signed-off-by: Pingfan Liu <piliu@redhat.com>
This commit is contained in:
Pingfan Liu 2025-12-01 09:44:11 +08:00
parent 0c07013d24
commit 6cae356c9b
2 changed files with 8 additions and 0 deletions
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4
98-kexec.rules
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@ -1,3 +1,7 @@
# The kernel updates the crash elfcorehdr for CPU and memory changes
SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
SUBSYSTEM=="memory", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
SUBSYSTEM=="cpu", ACTION=="add", GOTO="kdump_reload"
SUBSYSTEM=="cpu", ACTION=="remove", GOTO="kdump_reload"
SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload"

4
98-kexec.rules.ppc64
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@ -1,3 +1,7 @@
# The kernel updates the crash elfcorehdr for CPU and memory changes
SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
SUBSYSTEM=="memory", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
SUBSYSTEM=="cpu", ACTION=="online", GOTO="kdump_reload_cpu"
SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload_mem"
SUBSYSTEM=="memory", ACTION=="offline", GOTO="kdump_reload_mem"