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Subject[PATCH 4/4] mm: introduce no_ksm to disable totally KSM
Date
Introduce a new kernel parameter "no_ksm" to totally disable KSM.

Signed-off-by: WANG Cong <amwang@redhat.com>
---
mm/ksm.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/mm/ksm.c b/mm/ksm.c
index 9a68b0c..eeb45a2 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1984,11 +1984,24 @@ static struct attribute_group ksm_attr_group = {
};
#endif /* CONFIG_SYSFS */

+static int no_ksm;
+static int __init setup_ksm(char *str)
+{
+ no_ksm = 1;
+ return 0;
+}
+__setup("no_ksm", setup_ksm);
+
static int __init ksm_init(void)
{
struct task_struct *ksm_thread;
int err;

+ if (no_ksm) {
+ printk(KERN_INFO "ksm: disabled by cmdline\n");
+ return 0;
+ }
+
err = ksm_slab_init();
if (err)
goto out;
--
1.7.4.4


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