5 files changed, 23 insertions, 13 deletions

diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt
index 7740038d82bc..3c94ff3f9693 100644
--- a/Documentation/cgroups/cpusets.txt
+++ b/Documentation/cgroups/cpusets.txt
@@ -345,14 +345,14 @@ the named feature on.
 The implementation is simple.
 
 Setting the flag 'cpuset.memory_spread_page' turns on a per-process flag
-PF_SPREAD_PAGE for each task that is in that cpuset or subsequently
+PFA_SPREAD_PAGE for each task that is in that cpuset or subsequently
 joins that cpuset.  The page allocation calls for the page cache
-is modified to perform an inline check for this PF_SPREAD_PAGE task
+is modified to perform an inline check for this PFA_SPREAD_PAGE task
 flag, and if set, a call to a new routine cpuset_mem_spread_node()
 returns the node to prefer for the allocation.
 
 Similarly, setting 'cpuset.memory_spread_slab' turns on the flag
-PF_SPREAD_SLAB, and appropriately marked slab caches will allocate
+PFA_SPREAD_SLAB, and appropriately marked slab caches will allocate
 pages from the node returned by cpuset_mem_spread_node().
 
 The cpuset_mem_spread_node() routine is also simple.  It uses the
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index ade2390ffe92..6e39c9bb0dae 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -93,12 +93,12 @@ extern int cpuset_slab_spread_node(void);
 
 static inline int cpuset_do_page_mem_spread(void)
 {
-        return current->flags & PF_SPREAD_PAGE;
+        return task_spread_page(current);
 }
 
 static inline int cpuset_do_slab_mem_spread(void)
 {
-        return current->flags & PF_SPREAD_SLAB;
+        return task_spread_slab(current);
 }
 
 extern int current_cpuset_is_being_rebound(void);
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5630763956d9..7b1cafefb05e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1903,8 +1903,6 @@ extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut,
 #define PF_KTHREAD      0x00200000      /* I am a kernel thread */
 #define PF_RANDOMIZE    0x00400000      /* randomize virtual address space */
 #define PF_SWAPWRITE    0x00800000      /* Allowed to write to swap */
-#define PF_SPREAD_PAGE  0x01000000      /* Spread page cache over cpuset */
-#define PF_SPREAD_SLAB  0x02000000      /* Spread some slab caches over cpuset */
 #define PF_NO_SETAFFINITY 0x04000000    /* Userland is not allowed to meddle with cpus_allowed */
 #define PF_MCE_EARLY    0x08000000      /* Early kill for mce process policy */
 #define PF_MUTEX_TESTER 0x20000000      /* Thread belongs to the rt mutex tester */
@@ -1958,6 +1956,9 @@ static inline void memalloc_noio_restore(unsigned int flags)
 
 /* Per-process atomic flags. */
 #define PFA_NO_NEW_PRIVS 0      /* May not gain new privileges. */
+#define PFA_SPREAD_PAGE  1      /* Spread page cache over cpuset */
+#define PFA_SPREAD_SLAB  2      /* Spread some slab caches over cpuset */
+
 
 #define TASK_PFA_TEST(name, func)                                       \
         static inline bool task_##func(struct task_struct *p)           \
@@ -1972,6 +1973,14 @@ static inline void memalloc_noio_restore(unsigned int flags)
 TASK_PFA_TEST(NO_NEW_PRIVS, no_new_privs)
 TASK_PFA_SET(NO_NEW_PRIVS, no_new_privs)
 
+TASK_PFA_TEST(SPREAD_PAGE, spread_page)
+TASK_PFA_SET(SPREAD_PAGE, spread_page)
+TASK_PFA_CLEAR(SPREAD_PAGE, spread_page)
+
+TASK_PFA_TEST(SPREAD_SLAB, spread_slab)
+TASK_PFA_SET(SPREAD_SLAB, spread_slab)
+TASK_PFA_CLEAR(SPREAD_SLAB, spread_slab)
+
 /*
  * task->jobctl flags
  */
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 22874d7cf2c0..52cb04c993b7 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -365,13 +365,14 @@ static void cpuset_update_task_spread_flag(struct cpuset *cs,
                                         struct task_struct *tsk)
 {
         if (is_spread_page(cs))
-                tsk->flags |= PF_SPREAD_PAGE;
+                task_set_spread_page(tsk);
         else
-                tsk->flags &= ~PF_SPREAD_PAGE;
+                task_clear_spread_page(tsk);
+
         if (is_spread_slab(cs))
-                tsk->flags |= PF_SPREAD_SLAB;
+                task_set_spread_slab(tsk);
         else
-                tsk->flags &= ~PF_SPREAD_SLAB;
+                task_clear_spread_slab(tsk);
 }
 
 /*
diff --git a/mm/slab.c b/mm/slab.c
index a467b308c682..881951e67f12 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2994,7 +2994,7 @@ out:
 
 #ifdef CONFIG_NUMA
 /*
- * Try allocating on another node if PF_SPREAD_SLAB is a mempolicy is set.
+ * Try allocating on another node if PFA_SPREAD_SLAB is a mempolicy is set.
  *
  * If we are in_interrupt, then process context, including cpusets and
  * mempolicy, may not apply and should not be used for allocation policy.
@@ -3226,7 +3226,7 @@ __do_cache_alloc(struct kmem_cache *cache, gfp_t flags)
 {
         void *objp;
 
-        if (current->mempolicy || unlikely(current->flags & PF_SPREAD_SLAB)) {
+        if (current->mempolicy || cpuset_do_slab_mem_spread()) {
                 objp = alternate_node_alloc(cache, flags);
                 if (objp)
                         goto out;