2.6.0-t7-memleak-lkml.patch

   1 --- 2.6/mm/slab.c       2003-10-09 21:23:19.000000000 +0200
   2 +++ build-2.6/mm/slab.c 2003-10-16 07:32:06.000000000 +0200
   3 @@ -1891,6 +1891,15 @@
   4                 *dbg_redzone1(cachep, objp) = RED_ACTIVE;
   5                 *dbg_redzone2(cachep, objp) = RED_ACTIVE;
   6         }
   7 +       {
   8 +               int objnr;
   9 +               struct slab *slabp;
  10 +
  11 +               slabp = GET_PAGE_SLAB(virt_to_page(objp));
  12 +
  13 +               objnr = (objp - slabp->s_mem) / cachep->objsize;
  14 +               slab_bufctl(slabp)[objnr] = (int)caller;
  15 +       }
  16         objp += obj_dbghead(cachep);
  17         if (cachep->ctor && cachep->flags & SLAB_POISON) {
  18                 unsigned long   ctor_flags = SLAB_CTOR_CONSTRUCTOR;
  19 @@ -1952,12 +1961,14 @@
  20                 objnr = (objp - slabp->s_mem) / cachep->objsize;
  21                 check_slabp(cachep, slabp);
  22  #if DEBUG
  23 +#if 0
  24                 if (slab_bufctl(slabp)[objnr] != BUFCTL_FREE) {
  25                         printk(KERN_ERR "slab: double free detected in cache '%s', objp %p.\n",
  26                                                 cachep->name, objp);
  27                         BUG();
  28                 }
  29  #endif
  30 +#endif
  31                 slab_bufctl(slabp)[objnr] = slabp->free;
  32                 slabp->free = objnr;
  33                 STATS_DEC_ACTIVE(cachep);
  34 @@ -2694,6 +2705,22 @@
  35         .show   = s_show,
  36  };
  37
  38 +static void do_dump_slabp(kmem_cache_t *cachep)
  39 +{
  40 +       struct list_head *q;
  41 +
  42 +       check_irq_on();
  43 +       spin_lock_irq(&cachep->spinlock);
  44 +       list_for_each(q,&cachep->lists.slabs_full) {
  45 +               struct slab *slabp;
  46 +               int i;
  47 +               slabp = list_entry(q, struct slab, list);
  48 +               for (i=0;i<cachep->num;i++)
  49 +                       printk(KERN_DEBUG "obj %p/%d: %p\n", slabp, i, (void*)(slab_bufctl(slabp)[i]));
  50 +       }
  51 +       spin_unlock_irq(&cachep->spinlock);
  52 +}
  53 +
  54  #define MAX_SLABINFO_WRITE 128
  55  /**
  56   * slabinfo_write - Tuning for the slab allocator
  57 @@ -2734,6 +2761,7 @@
  58                             batchcount < 1 ||
  59                             batchcount > limit ||
  60                             shared < 0) {
  61 +                               do_dump_slabp(cachep);
  62                                 res = -EINVAL;
  63                         } else {
  64                                 res = do_tune_cpucache(cachep, limit, batchcount, shared);