1 files changed, 23 insertions, 7 deletions

diff --git a/mm/slab.c b/mm/slab.c
index f055c1420216..e6ef9bd52335 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -420,6 +420,7 @@ struct kmem_cache {
         unsigned long max_freeable;
         unsigned long node_allocs;
         unsigned long node_frees;
+        unsigned long node_overflow;
         atomic_t allochit;
         atomic_t allocmiss;
         atomic_t freehit;
@@ -465,6 +466,7 @@ struct kmem_cache {
 #define STATS_INC_ERR(x)        ((x)->errors++)
 #define STATS_INC_NODEALLOCS(x) ((x)->node_allocs++)
 #define STATS_INC_NODEFREES(x)  ((x)->node_frees++)
+#define STATS_INC_ACOVERFLOW(x)   ((x)->node_overflow++)
 #define STATS_SET_FREEABLE(x, i)                                        \
         do {                                                            \
                 if ((x)->max_freeable < i)                              \
@@ -484,6 +486,7 @@ struct kmem_cache {
 #define STATS_INC_ERR(x)        do { } while (0)
 #define STATS_INC_NODEALLOCS(x) do { } while (0)
 #define STATS_INC_NODEFREES(x)  do { } while (0)
+#define STATS_INC_ACOVERFLOW(x)   do { } while (0)
 #define STATS_SET_FREEABLE(x, i) do { } while (0)
 #define STATS_INC_ALLOCHIT(x)   do { } while (0)
 #define STATS_INC_ALLOCMISS(x)  do { } while (0)
@@ -1453,7 +1456,14 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid)
         int i;
 
         flags |= cachep->gfpflags;
+#ifndef CONFIG_MMU
+        /* nommu uses slab's for process anonymous memory allocations, so
+         * requires __GFP_COMP to properly refcount higher order allocations"
+         */
+        page = alloc_pages_node(nodeid, (flags | __GFP_COMP), cachep->gfporder);
+#else
         page = alloc_pages_node(nodeid, flags, cachep->gfporder);
+#endif
         if (!page)
                 return NULL;
         addr = page_address(page);
@@ -2318,13 +2328,15 @@ EXPORT_SYMBOL(kmem_cache_destroy);
 
 /* Get the memory for a slab management obj. */
 static struct slab *alloc_slabmgmt(struct kmem_cache *cachep, void *objp,
-                                   int colour_off, gfp_t local_flags)
+                                   int colour_off, gfp_t local_flags,
+                                   int nodeid)
 {
         struct slab *slabp;
 
         if (OFF_SLAB(cachep)) {
                 /* Slab management obj is off-slab. */
-                slabp = kmem_cache_alloc(cachep->slabp_cache, local_flags);
+                slabp = kmem_cache_alloc_node(cachep->slabp_cache,
+                                              local_flags, nodeid);
                 if (!slabp)
                         return NULL;
         } else {
@@ -2334,6 +2346,7 @@ static struct slab *alloc_slabmgmt(struct kmem_cache *cachep, void *objp,
         slabp->inuse = 0;
         slabp->colouroff = colour_off;
         slabp->s_mem = objp + colour_off;
+        slabp->nodeid = nodeid;
         return slabp;
 }
 
@@ -2519,7 +2532,7 @@ static int cache_grow(struct kmem_cache *cachep, gfp_t flags, int nodeid)
                 goto failed;
 
         /* Get slab management. */
-        slabp = alloc_slabmgmt(cachep, objp, offset, local_flags);
+        slabp = alloc_slabmgmt(cachep, objp, offset, local_flags, nodeid);
         if (!slabp)
                 goto opps1;
 
@@ -3080,9 +3093,11 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
                         if (l3->alien && l3->alien[nodeid]) {
                                 alien = l3->alien[nodeid];
                                 spin_lock(&alien->lock);
-                                if (unlikely(alien->avail == alien->limit))
+                                if (unlikely(alien->avail == alien->limit)) {
+                                        STATS_INC_ACOVERFLOW(cachep);
                                         __drain_alien_cache(cachep,
                                                             alien, nodeid);
+                                }
                                 alien->entry[alien->avail++] = objp;
                                 spin_unlock(&alien->lock);
                         } else {
@@ -3760,7 +3775,7 @@ static void print_slabinfo_header(struct seq_file *m)
         seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
 #if STATS
         seq_puts(m, " : globalstat <listallocs> <maxobjs> <grown> <reaped> "
-                 "<error> <maxfreeable> <nodeallocs> <remotefrees>");
+                 "<error> <maxfreeable> <nodeallocs> <remotefrees> <alienoverflow>");
         seq_puts(m, " : cpustat <allochit> <allocmiss> <freehit> <freemiss>");
 #endif
         seq_putc(m, '\n');
@@ -3874,11 +3889,12 @@ static int s_show(struct seq_file *m, void *p)
                 unsigned long max_freeable = cachep->max_freeable;
                 unsigned long node_allocs = cachep->node_allocs;
                 unsigned long node_frees = cachep->node_frees;
+                unsigned long overflows = cachep->node_overflow;
 
                 seq_printf(m, " : globalstat %7lu %6lu %5lu %4lu \
-                                %4lu %4lu %4lu %4lu", allocs, high, grown,
+                                %4lu %4lu %4lu %4lu %4lu", allocs, high, grown,
                                 reaped, errors, max_freeable, node_allocs,
-                                node_frees);
+                                node_frees, overflows);
         }
         /* cpu stats */
         {