Documentation: Update documentation on ppc-memtrace

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/Documentation/ABI/testing/ppc-memtrace b/Documentation/ABI/testing/ppc-memtrace
index 2e8b9374127002a0a82920099d23e642b89a6aa4..9606aed33137fc3e0b6c3a9955b02a4707187a09 100644 (file)
--- a/Documentation/ABI/testing/ppc-memtrace
+++ b/Documentation/ABI/testing/ppc-memtrace
@@ -13,10 +13,11 @@ Contact:    linuxppc-dev@lists.ozlabs.org
 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 the kernel mappings and the following debugfs files will be
-               created. This can only be successfully done once per boot. Once
-               memory is successfully removed from each node, the following
-               files are created.
+               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