From f9c27a7c7880c29c7579dea9134dfef355f6c3eb Mon Sep 17 00:00:00 2001 From: Honggang Li Date: Tue, 12 Aug 2014 21:36:15 +0800 Subject: [PATCH] percpu: free percpu allocation info for uniprocessor system commit 3189eddbcafcc4d827f7f19facbeddec4424eba8 upstream. Currently, only SMP system free the percpu allocation info. Uniprocessor system should free it too. For example, one x86 UML virtual machine with 256MB memory, UML kernel wastes one page memory. Signed-off-by: Honggang Li Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- mm/percpu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/percpu.c b/mm/percpu.c index 25e2ea52db82..9bc1bf914cc8 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1910,6 +1910,8 @@ void __init setup_per_cpu_areas(void) if (pcpu_setup_first_chunk(ai, fc) < 0) panic("Failed to initialize percpu areas."); + + pcpu_free_alloc_info(ai); } #endif /* CONFIG_SMP */ -- 2.20.1