doc: guide for mount /sys/devices/system/cpu in docker demo

Signed-off-by: blue-troy <12729455+blue-troy@users.noreply.github.com>

diff --git a/README.md b/README.md
index 50045e02ad4df627e5fdf1657c65919d4c3d9be3..b001faaaaec07e91b4df09b40a33ecce7514387f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@ docker run -it -m 256m --memory-swap 256m \
       -v /var/lib/lxcfs/proc/swaps:/proc/swaps:rw \
       -v /var/lib/lxcfs/proc/uptime:/proc/uptime:rw \
       -v /var/lib/lxcfs/proc/slabinfo:/proc/slabinfo:rw \
+      -v /var/lib/lxcfs/sys/devices/system/cpu:/sys/devices/system/cpu:rw \
       ubuntu:18.04 /bin/bash
  ```