[PATCH 3/3] tools/mm/thpmaps: fix missing mapping names

[Weilin Tong <tongweilin@linux.alibaba.com>]

VMAList splits smaps lines on whitespace and only keeps the mapping
name when there are exactly six fields. Names containing whitespace,
including paths with a (deleted) suffix, are therefore lost.

Limit splitting to the five fixed fields and preserve the remaining
name.

Fixes: 2444172cfde4 ("tools/mm: add thpmaps script to dump THP usage info")
Assisted-by: LLM
Signed-off-by: Weilin Tong <tongweilin@linux.alibaba.com>
---
 tools/mm/thpmaps | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/mm/thpmaps b/tools/mm/thpmaps
index 30a8e915d677..a1a9bc30514f 100644
--- a/tools/mm/thpmaps
+++ b/tools/mm/thpmaps
@@ -198,7 +198,7 @@ class VMAList:
         self.vmas = []
         with open(f'/proc/{pid}/smaps', 'r') as file:
             for line in file:
-                elements = line.split()
+                elements = line.rstrip('\n').split(maxsplit=5)
                 if '-' in elements[0]:
                     start, end = map(lambda x: int(x, 16), elements[0].split('-'))
                     major, minor = map(lambda x: int(x, 16), elements[3].split(':'))
-- 
2.43.7