From: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
Support sysctl interface(tunalbe parameter) to find a suitable munmap
operation unit at runtime favoringly
* sysctl: An interface for examining and dynamically changing munmap opearon
size parameters in Linux. In Linux, the sysctl is implemented as
a wrapper around file system routines that access contents of files
in the /proc
Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
Acked-by: Hyunjin Choi <hj89.choi@xxxxxxxxxxx>
CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
CC: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
CC: Steven Rostedt <rostedt@xxxxxxxxxx>
CC: Hugh Dickins <hughd@xxxxxxxxxx>
CC: Randy Dunlap <randy.dunlap@xxxxxxxxxx>
CC: Ingo Molnar <mingo@xxxxxxx>
---
kernel/sysctl.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index c0bb324..9b85041 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -56,6 +56,7 @@
#include <linux/kprobes.h>
#include <linux/pipe_fs_i.h>
#include <linux/oom.h>
+#include <linux/munmap_unit_size.h>
#include <asm/uaccess.h>
#include <asm/processor.h>
@@ -1278,6 +1279,15 @@ static struct ctl_table vm_table[] = {
.proc_handler = mmap_min_addr_handler,
},
#endif
+#ifdef CONFIG_MMU
+ {
+ .procname = "munmap_unit_size",
+ .data = &sysctl_munmap_unit_size,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = munmap_unit_size_handler,
+ },
+#endif
#ifdef CONFIG_NUMA
{
.procname = "numa_zonelist_order",
--
1.7.3.4
--
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