From 30a5b5367ef9d5c9055414e12ec2f02d9de2e70f Mon Sep 17 00:00:00 2001 From: Dennis Zhou Date: Mon, 19 Jun 2017 19:28:31 -0400 Subject: percpu: expose statistics about percpu memory via debugfs There is limited visibility into the use of percpu memory leaving us unable to reason about correctness of parameters and overall use of percpu memory. These counters and statistics aim to help understand basic statistics about percpu memory such as number of allocations over the lifetime, allocation sizes, and fragmentation. New Config: PERCPU_STATS Signed-off-by: Dennis Zhou Signed-off-by: Tejun Heo --- mm/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'mm/Kconfig') diff --git a/mm/Kconfig b/mm/Kconfig index beb7a455915d..8fae42606d56 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -706,3 +706,11 @@ config ARCH_USES_HIGH_VMA_FLAGS bool config ARCH_HAS_PKEYS bool + +config PERCPU_STATS + bool "Collect percpu memory statistics" + default n + help + This feature collects and exposes statistics via debugfs. The + information includes global and per chunk statistics, which can + be used to help understand percpu memory usage. -- cgit v1.2.3-55-g7522