Merge branch 'akpm' (incoming from Andrew)

Merge first patch-bomb from Andrew Morton:

 - a couple of misc things

 - inotify/fsnotify work from Jan

 - ocfs2 updates (partial)

 - about half of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (117 commits)
  mm/migrate: remove unused function, fail_migrate_page()
  mm/migrate: remove putback_lru_pages, fix comment on putback_movable_pages
  mm/migrate: correct failure handling if !hugepage_migration_support()
  mm/migrate: add comment about permanent failure path
  mm, page_alloc: warn for non-blockable __GFP_NOFAIL allocation failure
  mm: compaction: reset scanner positions immediately when they meet
  mm: compaction: do not mark unmovable pageblocks as skipped in async compaction
  mm: compaction: detect when scanners meet in isolate_freepages
  mm: compaction: reset cached scanner pfn's before reading them
  mm: compaction: encapsulate defer reset logic
  mm: compaction: trace compaction begin and end
  memcg, oom: lock mem_cgroup_print_oom_info
  sched: add tracepoints related to NUMA task migration
  mm: numa: do not automatically migrate KSM pages
  mm: numa: trace tasks that fail migration due to rate limiting
  mm: numa: limit scope of lock for NUMA migrate rate limiting
  mm: numa: make NUMA-migrate related functions static
  lib/show_mem.c: show num_poisoned_pages when oom
  mm/hwpoison: add '#' to hwpoison_inject
  mm/memblock: use WARN_ONCE when MAX_NUMNODES passed as input parameter
  ...

3 files changed, 155 insertions, 0 deletions

diff --git a/include/trace/events/compaction.h b/include/trace/events/compaction.h
index fde1b3e94c7d..06f544ef2f6f 100644
--- a/include/trace/events/compaction.h
+++ b/include/trace/events/compaction.h
@@ -67,6 +67,48 @@ TRACE_EVENT(mm_compaction_migratepages,
                 __entry->nr_failed)
 );
 
+TRACE_EVENT(mm_compaction_begin,
+        TP_PROTO(unsigned long zone_start, unsigned long migrate_start,
+                unsigned long free_start, unsigned long zone_end),
+
+        TP_ARGS(zone_start, migrate_start, free_start, zone_end),
+
+        TP_STRUCT__entry(
+                __field(unsigned long, zone_start)
+                __field(unsigned long, migrate_start)
+                __field(unsigned long, free_start)
+                __field(unsigned long, zone_end)
+        ),
+
+        TP_fast_assign(
+                __entry->zone_start = zone_start;
+                __entry->migrate_start = migrate_start;
+                __entry->free_start = free_start;
+                __entry->zone_end = zone_end;
+        ),
+
+        TP_printk("zone_start=%lu migrate_start=%lu free_start=%lu zone_end=%lu",
+                __entry->zone_start,
+                __entry->migrate_start,
+                __entry->free_start,
+                __entry->zone_end)
+);
+
+TRACE_EVENT(mm_compaction_end,
+        TP_PROTO(int status),
+
+        TP_ARGS(status),
+
+        TP_STRUCT__entry(
+                __field(int, status)
+        ),
+
+        TP_fast_assign(
+                __entry->status = status;
+        ),
+
+        TP_printk("status=%d", __entry->status)
+);
 
 #endif /* _TRACE_COMPACTION_H */
 
diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h
index ec2a6ccfd7e5..3075ffbb9a83 100644
--- a/include/trace/events/migrate.h
+++ b/include/trace/events/migrate.h
@@ -45,6 +45,32 @@ TRACE_EVENT(mm_migrate_pages,
                 __print_symbolic(__entry->reason, MIGRATE_REASON))
 );
 
+TRACE_EVENT(mm_numa_migrate_ratelimit,
+
+        TP_PROTO(struct task_struct *p, int dst_nid, unsigned long nr_pages),
+
+        TP_ARGS(p, dst_nid, nr_pages),
+
+        TP_STRUCT__entry(
+                __array(        char,           comm,   TASK_COMM_LEN)
+                __field(        pid_t,          pid)
+                __field(        int,            dst_nid)
+                __field(        unsigned long,  nr_pages)
+        ),
+
+        TP_fast_assign(
+                memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
+                __entry->pid            = p->pid;
+                __entry->dst_nid        = dst_nid;
+                __entry->nr_pages       = nr_pages;
+        ),
+
+        TP_printk("comm=%s pid=%d dst_nid=%d nr_pages=%lu",
+                __entry->comm,
+                __entry->pid,
+                __entry->dst_nid,
+                __entry->nr_pages)
+);
 #endif /* _TRACE_MIGRATE_H */
 
 /* This part must be outside protection */
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 04c308413a5d..67e1bbf83695 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -443,6 +443,93 @@ TRACE_EVENT(sched_process_hang,
 );
 #endif /* CONFIG_DETECT_HUNG_TASK */
 
+DECLARE_EVENT_CLASS(sched_move_task_template,
+
+        TP_PROTO(struct task_struct *tsk, int src_cpu, int dst_cpu),
+
+        TP_ARGS(tsk, src_cpu, dst_cpu),
+
+        TP_STRUCT__entry(
+                __field( pid_t, pid                     )
+                __field( pid_t, tgid                    )
+                __field( pid_t, ngid                    )
+                __field( int,   src_cpu                 )
+                __field( int,   src_nid                 )
+                __field( int,   dst_cpu                 )
+                __field( int,   dst_nid                 )
+        ),
+
+        TP_fast_assign(
+                __entry->pid            = task_pid_nr(tsk);
+                __entry->tgid           = task_tgid_nr(tsk);
+                __entry->ngid           = task_numa_group_id(tsk);
+                __entry->src_cpu        = src_cpu;
+                __entry->src_nid        = cpu_to_node(src_cpu);
+                __entry->dst_cpu        = dst_cpu;
+                __entry->dst_nid        = cpu_to_node(dst_cpu);
+        ),
+
+        TP_printk("pid=%d tgid=%d ngid=%d src_cpu=%d src_nid=%d dst_cpu=%d dst_nid=%d",
+                        __entry->pid, __entry->tgid, __entry->ngid,
+                        __entry->src_cpu, __entry->src_nid,
+                        __entry->dst_cpu, __entry->dst_nid)
+);
+
+/*
+ * Tracks migration of tasks from one runqueue to another. Can be used to
+ * detect if automatic NUMA balancing is bouncing between nodes
+ */
+DEFINE_EVENT(sched_move_task_template, sched_move_numa,
+        TP_PROTO(struct task_struct *tsk, int src_cpu, int dst_cpu),
+
+        TP_ARGS(tsk, src_cpu, dst_cpu)
+);
+
+DEFINE_EVENT(sched_move_task_template, sched_stick_numa,
+        TP_PROTO(struct task_struct *tsk, int src_cpu, int dst_cpu),
+
+        TP_ARGS(tsk, src_cpu, dst_cpu)
+);
+
+TRACE_EVENT(sched_swap_numa,
+
+        TP_PROTO(struct task_struct *src_tsk, int src_cpu,
+                 struct task_struct *dst_tsk, int dst_cpu),
+
+        TP_ARGS(src_tsk, src_cpu, dst_tsk, dst_cpu),
+
+        TP_STRUCT__entry(
+                __field( pid_t, src_pid                 )
+                __field( pid_t, src_tgid                )
+                __field( pid_t, src_ngid                )
+                __field( int,   src_cpu                 )
+                __field( int,   src_nid                 )
+                __field( pid_t, dst_pid                 )
+                __field( pid_t, dst_tgid                )
+                __field( pid_t, dst_ngid                )
+                __field( int,   dst_cpu                 )
+                __field( int,   dst_nid                 )
+        ),
+
+        TP_fast_assign(
+                __entry->src_pid        = task_pid_nr(src_tsk);
+                __entry->src_tgid       = task_tgid_nr(src_tsk);
+                __entry->src_ngid       = task_numa_group_id(src_tsk);
+                __entry->src_cpu        = src_cpu;
+                __entry->src_nid        = cpu_to_node(src_cpu);
+                __entry->dst_pid        = task_pid_nr(dst_tsk);
+                __entry->dst_tgid       = task_tgid_nr(dst_tsk);
+                __entry->dst_ngid       = task_numa_group_id(dst_tsk);
+                __entry->dst_cpu        = dst_cpu;
+                __entry->dst_nid        = cpu_to_node(dst_cpu);
+        ),
+
+        TP_printk("src_pid=%d src_tgid=%d src_ngid=%d src_cpu=%d src_nid=%d dst_pid=%d dst_tgid=%d dst_ngid=%d dst_cpu=%d dst_nid=%d",
+                        __entry->src_pid, __entry->src_tgid, __entry->src_ngid,
+                        __entry->src_cpu, __entry->src_nid,
+                        __entry->dst_pid, __entry->dst_tgid, __entry->dst_ngid,