This is a note to let you know that I've just added the patch titled
percpu: free percpu allocation info for uniprocessor system
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
percpu-free-percpu-allocation-info-for-uniprocessor-system.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3189eddbcafcc4d827f7f19facbeddec4424eba8 Mon Sep 17 00:00:00 2001
From: Honggang Li <enjoymindful@xxxxxxxxx>
Date: Tue, 12 Aug 2014 21:36:15 +0800
Subject: percpu: free percpu allocation info for uniprocessor system
From: Honggang Li <enjoymindful@xxxxxxxxx>
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 <enjoymindful@xxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/percpu.c | 2 ++
1 file changed, 2 insertions(+)
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1933,6 +1933,8 @@ 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 */
Patches currently in stable-queue which might be from enjoymindful@xxxxxxxxx are
queue-3.16/percpu-free-percpu-allocation-info-for-uniprocessor-system.patch
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