Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / vmpressure.h

diff --git a/kernel/include/linux/vmpressure.h b/kernel/include/linux/vmpressure.h
new file mode 100644 (file)
index 0000000..3e45358
--- /dev/null
+++ b/kernel/include/linux/vmpressure.h
@@ -0,0 +1,48 @@
+#ifndef __LINUX_VMPRESSURE_H
+#define __LINUX_VMPRESSURE_H
+
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/gfp.h>
+#include <linux/types.h>
+#include <linux/cgroup.h>
+#include <linux/eventfd.h>
+
+struct vmpressure {
+       unsigned long scanned;
+       unsigned long reclaimed;
+       /* The lock is used to keep the scanned/reclaimed above in sync. */
+       struct spinlock sr_lock;
+
+       /* The list of vmpressure_event structs. */
+       struct list_head events;
+       /* Have to grab the lock on events traversal or modifications. */
+       struct mutex events_lock;
+
+       struct work_struct work;
+};
+
+struct mem_cgroup;
+
+#ifdef CONFIG_MEMCG
+extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
+                      unsigned long scanned, unsigned long reclaimed);
+extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
+
+extern void vmpressure_init(struct vmpressure *vmpr);
+extern void vmpressure_cleanup(struct vmpressure *vmpr);
+extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
+extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
+extern int vmpressure_register_event(struct mem_cgroup *memcg,
+                                    struct eventfd_ctx *eventfd,
+                                    const char *args);
+extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
+                                       struct eventfd_ctx *eventfd);
+#else
+static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
+                             unsigned long scanned, unsigned long reclaimed) {}
+static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
+                                  int prio) {}
+#endif /* CONFIG_MEMCG */
+#endif /* __LINUX_VMPRESSURE_H */