[dpdk-dev] [PATCH] usertools: show an error message if unable to reserve requested hugepages

[Sarosh Arif]

Sometimes the system is unable to reserve the requested hugepages because
enough space is not available in the RAM. In that case, currently the
script displays no error message hence the user can be under the delusion
that the hugepages he requested are all successfully reserved. This patch
displays an error message if the pages reserved are different from the
requested pages and shows the actual pages reserved.

Signed-off-by: Sarosh Arif <sarosh.arif at emumba.com>
---
 usertools/dpdk-hugepages.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/usertools/dpdk-hugepages.py b/usertools/dpdk-hugepages.py
index 1be100ca3..3f6e62c8f 100755
--- a/usertools/dpdk-hugepages.py
+++ b/usertools/dpdk-hugepages.py
@@ -62,7 +62,10 @@ def set_hugepages(path, pages):
         filename = os.path.basename(path)
         size = filename[10:]
         sys.exit('{} is not a valid system huge page size'.format(size))
-
+    if get_hugepages(path) != pages:
+        print("Unable to reserve required pages. The pages reserved are:")
+        show_pages()
+        args.show = False

 def show_numa_pages():
     '''Show huge page reservations on Numa system'''
@@ -232,6 +235,8 @@ def main():
         '--setup',
         metavar='SIZE',
         help='setup huge pages by doing clear, unmount, reserve and mount')
+
+    global args
     args = parser.parse_args()
 
     if args.setup:
-- 
2.25.1