9dc1407859
Update ABI documentation about the introduction of the new sysfs entry bootargs_append. This sysfs entry will be used to setup the additional parameters to be passed to dump capture kernel. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/20240510082114.561163-1-hbathini@linux.ibm.com
59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
What: /sys/kernel/fadump/*
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Date: Dec 2019
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Contact: linuxppc-dev@lists.ozlabs.org
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Description:
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The /sys/kernel/fadump/* is a collection of FADump sysfs
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file provide information about the configuration status
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of Firmware Assisted Dump (FADump).
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What: /sys/kernel/fadump/enabled
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Date: Dec 2019
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: read only
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Primarily used to identify whether the FADump is enabled in
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the kernel or not.
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User: Kdump service
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What: /sys/kernel/fadump/registered
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Date: Dec 2019
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: read/write
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Helps to control the dump collect feature from userspace.
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Setting 1 to this file enables the system to collect the
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dump and 0 to disable it.
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User: Kdump service
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What: /sys/kernel/fadump/release_mem
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Date: Dec 2019
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: write only
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This is a special sysfs file and only available when
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the system is booted to capture the vmcore using FADump.
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It is used to release the memory reserved by FADump to
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save the crash dump.
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What: /sys/kernel/fadump/mem_reserved
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Date: Dec 2019
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: read only
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Provide information about the amount of memory reserved by
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FADump to save the crash dump in bytes.
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What: /sys/kernel/fadump/hotplug_ready
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Date: Apr 2024
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: read only
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Kdump udev rule re-registers fadump on memory add/remove events,
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primarily to update the elfcorehdr. This sysfs indicates the
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kdump udev rule that fadump re-registration is not required on
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memory add/remove events because elfcorehdr is now prepared in
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the second/fadump kernel.
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User: kexec-tools
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What: /sys/kernel/fadump/bootargs_append
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Date: May 2024
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Contact: linuxppc-dev@lists.ozlabs.org
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Description: read/write
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This is a special sysfs file available to setup additional
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parameters to be passed to capture kernel.
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