a8523f55a8
With the introduction of kernel commit c6c5b14dac0d ("powerpc: make fadump
resilient with memory add/remove events") linux kernel now internally manages
the update of elfcorehdr during memory add/remove events. So no need to
re-register fadump if the /sys/kernel/fadump/hotplug_ready is set to 1.
No impact for kernels that do not have /sys/kernel/fadump/hotplug_ready
sysfs.
Relevant kernel commit links:
1. https://msgid.link/20240422195932.1583833-2-sourabhjain@linux.ibm.com
2. https://msgid.link/20240422195932.1583833-3-sourabhjain@linux.ibm.com
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
29 lines
1.3 KiB
Plaintext
29 lines
1.3 KiB
Plaintext
# The kernel updates the crash elfcorehdr for CPU and memory changes
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SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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SUBSYSTEM=="memory", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
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SUBSYSTEM=="cpu", ACTION=="online", GOTO="kdump_reload_cpu"
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SUBSYSTEM=="memory", ACTION=="online", GOTO="kdump_reload_mem"
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SUBSYSTEM=="memory", ACTION=="offline", GOTO="kdump_reload_mem"
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GOTO="kdump_reload_end"
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# If kdump is not loaded, calling kdump-udev-throttle will end up
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# doing nothing, but systemd-run will always generate extra logs for
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# each call, so trigger the kdump-udev-throttler only if kdump
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# service is active to avoid unnecessary logs
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LABEL="kdump_reload_mem"
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# Don't re-register fadump if /sys/kernel/fadump/hotplug_ready sysfs is set to 1.
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RUN+="/bin/sh -c '/usr/bin/systemctl is-active kdump.service || exit 0; ! test -f /sys/kernel/fadump/hotplug_ready || cat /sys/kernel/fadump/hotplug_ready | grep 1 || exit 0; /usr/bin/systemd-run --quiet --no-block /usr/lib/udev/kdump-udev-throttler'"
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GOTO="kdump_reload_end"
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LABEL="kdump_reload_cpu"
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RUN+="/bin/sh -c '/usr/bin/systemctl is-active kdump.service || exit 0; ! test -f /sys/kernel/fadump/enabled || cat /sys/kernel/fadump/enabled | grep 0 || exit 0; /usr/bin/systemd-run --quiet --no-block /usr/lib/udev/kdump-udev-throttler'"
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LABEL="kdump_reload_end"
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