1 What: /sys/kernel/debug/powerpc/memt 1 What: /sys/kernel/debug/powerpc/memtrace
2 Date: Aug 2017 2 Date: Aug 2017
3 KernelVersion: 4.14 3 KernelVersion: 4.14
4 Contact: linuxppc-dev@lists.ozlabs.org 4 Contact: linuxppc-dev@lists.ozlabs.org
5 Description: This folder contains the relev 5 Description: This folder contains the relevant debugfs files for the
6 hardware trace macro to use. C 6 hardware trace macro to use. CONFIG_PPC64_HARDWARE_TRACING
7 must be set. 7 must be set.
8 8
9 What: /sys/kernel/debug/powerpc/memt 9 What: /sys/kernel/debug/powerpc/memtrace/enable
10 Date: Aug 2017 10 Date: Aug 2017
11 KernelVersion: 4.14 11 KernelVersion: 4.14
12 Contact: linuxppc-dev@lists.ozlabs.org 12 Contact: linuxppc-dev@lists.ozlabs.org
13 Description: Write an integer containing th 13 Description: Write an integer containing the size in bytes of the memory
14 you want removed from each NUM 14 you want removed from each NUMA node to this file - it must be
15 aligned to the memblock size. 15 aligned to the memblock size. This amount of RAM will be removed
16 from each NUMA node in the ker 16 from each NUMA node in the kernel mappings and the following
17 debugfs files will be created. 17 debugfs files will be created. Once memory is successfully
18 removed from each node, the fo 18 removed from each node, the following files are created. To
19 re-add memory to the kernel, e 19 re-add memory to the kernel, echo 0 into this file (it will be
20 automatically onlined). 20 automatically onlined).
21 21
22 What: /sys/kernel/debug/powerpc/memt 22 What: /sys/kernel/debug/powerpc/memtrace/<node-id>
23 Date: Aug 2017 23 Date: Aug 2017
24 KernelVersion: 4.14 24 KernelVersion: 4.14
25 Contact: linuxppc-dev@lists.ozlabs.org 25 Contact: linuxppc-dev@lists.ozlabs.org
26 Description: This directory contains inform 26 Description: This directory contains information about the removed memory
27 from the specific NUMA node. 27 from the specific NUMA node.
28 28
29 What: /sys/kernel/debug/powerpc/memt 29 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/size
30 Date: Aug 2017 30 Date: Aug 2017
31 KernelVersion: 4.14 31 KernelVersion: 4.14
32 Contact: linuxppc-dev@lists.ozlabs.org 32 Contact: linuxppc-dev@lists.ozlabs.org
33 Description: This contains the size of the 33 Description: This contains the size of the memory removed from the node.
34 34
35 What: /sys/kernel/debug/powerpc/memt 35 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/start
36 Date: Aug 2017 36 Date: Aug 2017
37 KernelVersion: 4.14 37 KernelVersion: 4.14
38 Contact: linuxppc-dev@lists.ozlabs.org 38 Contact: linuxppc-dev@lists.ozlabs.org
39 Description: This contains the start addres 39 Description: This contains the start address of the removed memory.
40 40
41 What: /sys/kernel/debug/powerpc/memt 41 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/trace
42 Date: Aug 2017 42 Date: Aug 2017
43 KernelVersion: 4.14 43 KernelVersion: 4.14
44 Contact: linuxppc-dev@lists.ozlabs.org 44 Contact: linuxppc-dev@lists.ozlabs.org
45 Description: This is where the hardware tra 45 Description: This is where the hardware trace macro will output the trace
46 it generates. 46 it generates.
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