SLUB slab validation: Move tracking information alloc outside of lock

[karo-tx-linux.git] / mm / slub.c

diff --git a/mm/slub.c b/mm/slub.c
index 3c9e98f0999a241cbc64163e50996fc31c36929c..a5832f82234c9406f95a793bbab54962e1b232b8 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2902,18 +2902,14 @@ static void free_loc_track(struct loc_track *t)
                        get_order(sizeof(struct location) * t->max));
 }
 
-static int alloc_loc_track(struct loc_track *t, unsigned long max)
+static int alloc_loc_track(struct loc_track *t, unsigned long max, gfp_t flags)
 {
        struct location *l;
        int order;
 
-       if (!max)
-               max = PAGE_SIZE / sizeof(struct location);
-
        order = get_order(sizeof(struct location) * max);
 
-       l = (void *)__get_free_pages(GFP_ATOMIC, order);
-
+       l = (void *)__get_free_pages(flags, order);
        if (!l)
                return 0;
 
@@ -2979,7 +2975,7 @@ static int add_location(struct loc_track *t, struct kmem_cache *s,
        /*
         * Not found. Insert new tracking element.
         */
-       if (t->count >= t->max && !alloc_loc_track(t, 2 * t->max))
+       if (t->count >= t->max && !alloc_loc_track(t, 2 * t->max, GFP_ATOMIC))
                return 0;
 
        l = t->loc + pos;
@@ -3022,11 +3018,12 @@ static int list_locations(struct kmem_cache *s, char *buf,
 {
        int n = 0;
        unsigned long i;
-       struct loc_track t;
+       struct loc_track t = { 0, 0, NULL };
        int node;
 
-       t.count = 0;
-       t.max = 0;
+       if (!alloc_loc_track(&t, PAGE_SIZE / sizeof(struct location),
+                       GFP_KERNEL))
+               return sprintf(buf, "Out of memory\n");
 
        /* Push back cpu slabs */
        flush_all(s);