cpuset,mm: update tasks' mems_allowed in time

[safe/jmp/linux-2.6] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c900aa5..1048bf5 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1318,7 +1318,8 @@ struct task_struct {
 /* Thread group tracking */
        u32 parent_exec_id;
        u32 self_exec_id;
-/* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
+/* Protection of (de-)allocation: mm, files, fs, tty, keyrings, mems_allowed,
+ * mempolicy */
        spinlock_t alloc_lock;
 
 #ifdef CONFIG_GENERIC_HARDIRQS
@@ -1386,8 +1387,7 @@ struct task_struct {
        cputime_t acct_timexpd; /* stime + utime since last update */
 #endif
 #ifdef CONFIG_CPUSETS
-       nodemask_t mems_allowed;
-       int cpuset_mems_generation;
+       nodemask_t mems_allowed;        /* Protected by alloc_lock */
        int cpuset_mem_spread_rotor;
 #endif
 #ifdef CONFIG_CGROUPS
@@ -1410,7 +1410,7 @@ struct task_struct {
        struct list_head perf_counter_list;
 #endif
 #ifdef CONFIG_NUMA
-       struct mempolicy *mempolicy;
+       struct mempolicy *mempolicy;    /* Protected by alloc_lock */
        short il_next;
 #endif
        atomic_t fs_excl;       /* holding fs exclusive resources */