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 the kernel mappings and the following debugfs files will be
17 debugfs files will be created. !! 17 created. This can only be successfully done once per boot. Once
18 removed from each node, the fo !! 18 memory is successfully removed from each node, the following
19 re-add memory to the kernel, e !! 19 files are created.
20 automatically onlined). <<
21 20
22 What: /sys/kernel/debug/powerpc/memt 21 What: /sys/kernel/debug/powerpc/memtrace/<node-id>
23 Date: Aug 2017 22 Date: Aug 2017
24 KernelVersion: 4.14 23 KernelVersion: 4.14
25 Contact: linuxppc-dev@lists.ozlabs.org 24 Contact: linuxppc-dev@lists.ozlabs.org
26 Description: This directory contains inform 25 Description: This directory contains information about the removed memory
27 from the specific NUMA node. 26 from the specific NUMA node.
28 27
29 What: /sys/kernel/debug/powerpc/memt 28 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/size
30 Date: Aug 2017 29 Date: Aug 2017
31 KernelVersion: 4.14 30 KernelVersion: 4.14
32 Contact: linuxppc-dev@lists.ozlabs.org 31 Contact: linuxppc-dev@lists.ozlabs.org
33 Description: This contains the size of the 32 Description: This contains the size of the memory removed from the node.
34 33
35 What: /sys/kernel/debug/powerpc/memt 34 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/start
36 Date: Aug 2017 35 Date: Aug 2017
37 KernelVersion: 4.14 36 KernelVersion: 4.14
38 Contact: linuxppc-dev@lists.ozlabs.org 37 Contact: linuxppc-dev@lists.ozlabs.org
39 Description: This contains the start addres 38 Description: This contains the start address of the removed memory.
40 39
41 What: /sys/kernel/debug/powerpc/memt 40 What: /sys/kernel/debug/powerpc/memtrace/<node-id>/trace
42 Date: Aug 2017 41 Date: Aug 2017
43 KernelVersion: 4.14 42 KernelVersion: 4.14
44 Contact: linuxppc-dev@lists.ozlabs.org 43 Contact: linuxppc-dev@lists.ozlabs.org
45 Description: This is where the hardware tra 44 Description: This is where the hardware trace macro will output the trace
46 it generates. 45 it generates.
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