1 files changed, 20 insertions, 27 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index dac5086e3815..977cb57d7bc9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -722,8 +722,8 @@ struct task_struct {
 	unsigned			restore_sigmask:1;
 #endif
 #ifdef CONFIG_MEMCG
-	unsigned			memcg_may_oom:1;
-#ifndef CONFIG_SLOB
+	unsigned			in_user_fault:1;
+#ifdef CONFIG_MEMCG_KMEM
 	unsigned			memcg_kmem_skip_account:1;
 #endif
 #endif
@@ -734,6 +734,10 @@ struct task_struct {
 	/* disallow userland-initiated cgroup migration */
 	unsigned			no_cgroup_migration:1;
 #endif
+#ifdef CONFIG_BLK_CGROUP
+	/* to be used once the psi infrastructure lands upstream. */
+	unsigned			use_memdelay:1;
+#endif
 
 	unsigned long			atomic_flags; /* Flags requiring atomic access. */
 
@@ -775,7 +779,8 @@ struct task_struct {
 	struct list_head		ptrace_entry;
 
 	/* PID/PID hash table linkage. */
-	struct pid_link			pids[PIDTYPE_MAX];
+	struct pid			*thread_pid;
+	struct hlist_node		pid_links[PIDTYPE_MAX];
 	struct list_head		thread_group;
 	struct list_head		thread_node;
 
@@ -849,6 +854,7 @@ struct task_struct {
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
 	unsigned long			last_switch_count;
+	unsigned long			last_switch_time;
 #endif
 	/* Filesystem information: */
 	struct fs_struct		*fs;
@@ -1148,6 +1154,13 @@ struct task_struct {
 
 	/* Number of pages to reclaim on returning to userland: */
 	unsigned int			memcg_nr_pages_over_high;
+
+	/* Used by memcontrol for targeted memcg charge: */
+	struct mem_cgroup		*active_memcg;
+#endif
+
+#ifdef CONFIG_BLK_CGROUP
+	struct request_queue		*throttle_queue;
 #endif
 
 #ifdef CONFIG_UPROBES
@@ -1198,27 +1211,7 @@ struct task_struct {
 
 static inline struct pid *task_pid(struct task_struct *task)
 {
-	return task->pids[PIDTYPE_PID].pid;
-}
-
-static inline struct pid *task_tgid(struct task_struct *task)
-{
-	return task->group_leader->pids[PIDTYPE_PID].pid;
-}
-
-/*
- * Without tasklist or RCU lock it is not safe to dereference
- * the result of task_pgrp/task_session even if task == current,
- * we can race with another thread doing sys_setsid/sys_setpgid.
- */
-static inline struct pid *task_pgrp(struct task_struct *task)
-{
-	return task->group_leader->pids[PIDTYPE_PGID].pid;
-}
-
-static inline struct pid *task_session(struct task_struct *task)
-{
-	return task->group_leader->pids[PIDTYPE_SID].pid;
+	return task->thread_pid;
 }
 
 /*
@@ -1267,7 +1260,7 @@ static inline pid_t task_tgid_nr(struct task_struct *tsk)
  */
 static inline int pid_alive(const struct task_struct *p)
 {
-	return p->pids[PIDTYPE_PID].pid != NULL;
+	return p->thread_pid != NULL;
 }
 
 static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
@@ -1293,12 +1286,12 @@ static inline pid_t task_session_vnr(struct task_struct *tsk)
 
 static inline pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
 {
-	return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, ns);
+	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, ns);
 }
 
 static inline pid_t task_tgid_vnr(struct task_struct *tsk)
 {
-	return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, NULL);
+	return __task_pid_nr_ns(tsk, PIDTYPE_TGID, NULL);
 }
 
 static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns)