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- What: /sys/kernel/debug/powerpc/memtrace
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: This folder contains the relevant debugfs files for the
- hardware trace macro to use. CONFIG_PPC64_HARDWARE_TRACING
- must be set.
- What: /sys/kernel/debug/powerpc/memtrace/enable
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: Write an integer containing the size in bytes of the memory
- you want removed from each NUMA node to this file - it must be
- aligned to the memblock size. This amount of RAM will be removed
- from each NUMA node in the kernel mappings and the following
- debugfs files will be created. Once memory is successfully
- removed from each node, the following files are created. To
- re-add memory to the kernel, echo 0 into this file (it will be
- automatically onlined).
- What: /sys/kernel/debug/powerpc/memtrace/<node-id>
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: This directory contains information about the removed memory
- from the specific NUMA node.
- What: /sys/kernel/debug/powerpc/memtrace/<node-id>/size
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: This contains the size of the memory removed from the node.
- What: /sys/kernel/debug/powerpc/memtrace/<node-id>/start
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: This contains the start address of the removed memory.
- What: /sys/kernel/debug/powerpc/memtrace/<node-id>/trace
- Date: Aug 2017
- KernelVersion: 4.14
- Contact: [email protected]
- Description: This is where the hardware trace macro will output the trace
- it generates.
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