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d8e73458f3
Add a sys interface to allow querying the memory reserved by FADump for saving the crash dump. Also added Documentation/ABI for the new sysfs file. Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20191211160910.21656-7-sourabhjain@linux.ibm.com
40 lines
1.3 KiB
Text
40 lines
1.3 KiB
Text
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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