After stackdepot evicting support patchset[1], we rename
pool_index to pools_num.
To avoid from the below issue, we rename consistently in
gdb scripts.
Python Exception <class 'gdb.error'>: No symbol "pool_index" in current
context.
Error occurred in Python: No symbol "pool_index" in current context.
[1] https://lore.kernel.org/linux-mm/cover.1700502145.git.andreyknvl@xxxxxxxxxx/
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>