From ca13a4b6c60ccc6bc0d5887cfd78edc109ac2681 Mon Sep 17 00:00:00 2001
From: Andrea Arcangeli <aarcange@redhat.com>
Date: Tue, 20 Jan 2009 22:26:07 +0100
Subject: [PATCH 09/54] ksmctl

ksmctl executable.

Signed-off-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
RH-Upstream-status: pending
---
 user/ksmctl.c |   69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 69 insertions(+), 0 deletions(-)
 create mode 100644 user/ksmctl.c

diff --git a/user/ksmctl.c b/user/ksmctl.c
new file mode 100644
index 0000000..546dbaf
--- /dev/null
+++ b/user/ksmctl.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include "../kernel/ksm/ksm.h"
+
+int main(int argc, char *argv[])
+{
+	int fd;
+	int used = 0;
+	int fd_start;
+	struct ksm_kthread_info info;
+	
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s {start npages sleep | stop | info}\n", argv[0]);
+		exit(1);
+	}
+
+	fd = open("/dev/ksm", O_RDWR | O_TRUNC, (mode_t)0600);
+	if (fd == -1) {
+		fprintf(stderr, "could not open /dev/ksm\n");
+		exit(1);
+	}
+
+	if (!strncmp(argv[1], "start", strlen(argv[1]))) {
+		used = 1;
+		if (argc < 4) {
+			fprintf(stderr,
+		    "usage: %s start npages_to_scan sleep\n",
+		    argv[0]);
+			exit(1);
+		}
+		info.pages_to_scan = atoi(argv[2]);
+		info.sleep = atoi(argv[3]);
+		info.flags = ksm_control_flags_run;
+
+		fd_start = ioctl(fd, KSM_START_STOP_KTHREAD, &info);
+		if (fd_start == -1) {
+			fprintf(stderr, "KSM_START_KTHREAD failed\n");
+			exit(1);
+		}
+		printf("created scanner\n");
+	}
+
+	if (!strncmp(argv[1], "stop", strlen(argv[1]))) {
+		used = 1;
+		info.flags = 0;
+		fd_start = ioctl(fd, KSM_START_STOP_KTHREAD, &info);
+		printf("stopped scanner\n");
+	}
+
+	if (!strncmp(argv[1], "info", strlen(argv[1]))) {
+		used = 1;
+		ioctl(fd, KSM_GET_INFO_KTHREAD, &info);
+	 printf("flags %d, pages_to_scan %d, sleep_time %d\n",
+	 info.flags, info.pages_to_scan, info.sleep);
+	}
+
+	if (!used)
+		fprintf(stderr, "unknown command %s\n", argv[1]);
+
+	return 0;
+}
-- 
1.6.1