[-mm PATCH 2/9] Memory controller containers setup (v6)

[Balbir Singh <balbir@linux.vnet.ibm.com>]

Changelong
1. use depends instead of select in init/Kconfig
2. Port to v11
3. Clean up the usage of names (container files) for v11

Setup the memory container and add basic hooks and controls to integrate
and work with the container.

Signed-off-by: <balbir@linux.vnet.ibm.com>
---

 include/linux/container_subsys.h |    6 +
 include/linux/memcontrol.h       |   21 ++++++
 init/Kconfig                     |    7 ++
 mm/Makefile                      |    1 
 mm/memcontrol.c                  |  127 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 162 insertions(+)

diff -puN include/linux/container_subsys.h~mem-control-setup include/linux/container_subsys.h
--- linux-2.6.23-rc2-mm2/include/linux/container_subsys.h~mem-control-setup	2007-08-17 13:14:19.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/include/linux/container_subsys.h	2007-08-17 13:14:19.000000000 +0530
@@ -30,3 +30,9 @@ SUBSYS(ns)
 #endif
 
 /* */
+
+#ifdef CONFIG_CONTAINER_MEM_CONT
+SUBSYS(mem_container)
+#endif
+
+/* */
diff -puN /dev/null include/linux/memcontrol.h
--- /dev/null	2007-06-01 20:42:04.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/include/linux/memcontrol.h	2007-08-17 13:14:19.000000000 +0530
@@ -0,0 +1,21 @@
+/* memcontrol.h - Memory Controller
+ *
+ * Copyright IBM Corporation, 2007
+ * Author Balbir Singh <balbir@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _LINUX_MEMCONTROL_H
+#define _LINUX_MEMCONTROL_H
+
+#endif /* _LINUX_MEMCONTROL_H */
+
diff -puN init/Kconfig~mem-control-setup init/Kconfig
--- linux-2.6.23-rc2-mm2/init/Kconfig~mem-control-setup	2007-08-17 13:14:19.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/init/Kconfig	2007-08-17 13:14:19.000000000 +0530
@@ -364,6 +364,13 @@ config SYSFS_DEPRECATED
 	  If you are using a distro that was released in 2006 or later,
 	  it should be safe to say N here.
 
+config CONTAINER_MEM_CONT
+	bool "Memory controller for containers"
+	depends on CONTAINERS && RESOURCE_COUNTERS
+	help
+	  Provides a memory controller that manages both page cache and
+	  RSS memory.
+
 config PROC_PID_CPUSET
 	bool "Include legacy /proc/<pid>/cpuset file"
 	depends on CPUSETS
diff -puN mm/Makefile~mem-control-setup mm/Makefile
--- linux-2.6.23-rc2-mm2/mm/Makefile~mem-control-setup	2007-08-17 13:14:19.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/mm/Makefile	2007-08-17 13:14:19.000000000 +0530
@@ -31,4 +31,5 @@ obj-$(CONFIG_FS_XIP) += filemap_xip.o
 obj-$(CONFIG_MIGRATION) += migrate.o
 obj-$(CONFIG_SMP) += allocpercpu.o
 obj-$(CONFIG_QUICKLIST) += quicklist.o
+obj-$(CONFIG_CONTAINER_MEM_CONT) += memcontrol.o
 
diff -puN /dev/null mm/memcontrol.c
--- /dev/null	2007-06-01 20:42:04.000000000 +0530
+++ linux-2.6.23-rc2-mm2-balbir/mm/memcontrol.c	2007-08-17 13:14:19.000000000 +0530
@@ -0,0 +1,127 @@
+/* memcontrol.c - Memory Controller
+ *
+ * Copyright IBM Corporation, 2007
+ * Author Balbir Singh <balbir@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/res_counter.h>
+#include <linux/memcontrol.h>
+#include <linux/container.h>
+
+struct container_subsys mem_container_subsys;
+
+/*
+ * The memory controller data structure. The memory controller controls both
+ * page cache and RSS per container. We would eventually like to provide
+ * statistics based on the statistics developed by Rik Van Riel for clock-pro,
+ * to help the administrator determine what knobs to tune.
+ *
+ * TODO: Add a water mark for the memory controller. Reclaim will begin when
+ * we hit the water mark.
+ */
+struct mem_container {
+	struct container_subsys_state css;
+	/*
+	 * the counter to account for memory usage
+	 */
+	struct res_counter res;
+};
+
+/*
+ * A page_container page is associated with every page descriptor. The
+ * page_container helps us identify information about the container
+ */
+struct page_container {
+	struct list_head lru;		/* per container LRU list */
+	struct page *page;
+	struct mem_container *mem_container;
+};
+
+
+static inline
+struct mem_container *mem_container_from_cont(struct container *cont)
+{
+	return container_of(container_subsys_state(cont,
+				mem_container_subsys_id), struct mem_container,
+				css);
+}
+
+static ssize_t mem_container_read(struct container *cont, struct cftype *cft,
+			struct file *file, char __user *userbuf, size_t nbytes,
+			loff_t *ppos)
+{
+	return res_counter_read(&mem_container_from_cont(cont)->res,
+				cft->private, userbuf, nbytes, ppos);
+}
+
+static ssize_t mem_container_write(struct container *cont, struct cftype *cft,
+				struct file *file, const char __user *userbuf,
+				size_t nbytes, loff_t *ppos)
+{
+	return res_counter_write(&mem_container_from_cont(cont)->res,
+				cft->private, userbuf, nbytes, ppos);
+}
+
+static struct cftype mem_container_files[] = {
+	{
+		.name = "usage",
+		.private = RES_USAGE,
+		.read = mem_container_read,
+	},
+	{
+		.name = "limit",
+		.private = RES_LIMIT,
+		.write = mem_container_write,
+		.read = mem_container_read,
+	},
+	{
+		.name = "failcnt",
+		.private = RES_FAILCNT,
+		.read = mem_container_read,
+	},
+};
+
+static struct container_subsys_state *
+mem_container_create(struct container_subsys *ss, struct container *cont)
+{
+	struct mem_container *mem;
+
+	mem = kzalloc(sizeof(struct mem_container), GFP_KERNEL);
+	if (!mem)
+		return -ENOMEM;
+
+	res_counter_init(&mem->res);
+	return &mem->css;
+}
+
+static void mem_container_destroy(struct container_subsys *ss,
+				struct container *cont)
+{
+	kfree(mem_container_from_cont(cont));
+}
+
+static int mem_container_populate(struct container_subsys *ss,
+				struct container *cont)
+{
+	return container_add_files(cont, ss, mem_container_files,
+					ARRAY_SIZE(mem_container_files));
+}
+
+struct container_subsys mem_container_subsys = {
+	.name = "memory",
+	.subsys_id = mem_container_subsys_id,
+	.create = mem_container_create,
+	.destroy = mem_container_destroy,
+	.populate = mem_container_populate,
+	.early_init = 0,
+};
_

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL