[PATCH v1] buildtools: ensure the NUMA nodes are counted correct

[Chaoyong He]

From: Peng Zhang <peng.zhang at corigine.com>

Sorting a list of strings with the format "node[0-9]+" in order to find the
largest integer by looking at the last item after the sort breaks. But if
there are more then 10 items as a string sort will sort "node10" before
"node2", it will get the error NUMA nodes.

Solve this by sorting the list based on the integer part of the string.

Fixes: 8ef09fdc506b ("build: add optional NUMA and CPU counts detection")
Cc: stable at dpdk.org

Signed-off-by: Peng Zhang <peng.zhang at corigine.com>
Signed-off-by: Chaoyong He <chaoyong.he at corigine.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund at corigine.com>
---
 buildtools/get-numa-count.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/buildtools/get-numa-count.py b/buildtools/get-numa-count.py
index 1b7787787f..2f243886cd 100644
--- a/buildtools/get-numa-count.py
+++ b/buildtools/get-numa-count.py
@@ -6,11 +6,12 @@
 import glob
 import os
 import subprocess
+import re
 
 if os.name == 'posix':
     if os.path.isdir('/sys/devices/system/node'):
         numa_nodes = glob.glob('/sys/devices/system/node/node*')
-        numa_nodes.sort()
+        numa_nodes.sort(key=lambda l: int(re.findall('\d+', l)[0]))
         print(int(os.path.basename(numa_nodes[-1])[4:]) + 1)
     else:
         subprocess.run(['sysctl', '-n', 'vm.ndomains'], check=False)
-- 
2.27.0