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-rw-r--r--include/linux/slab.h22
-rw-r--r--mm/slab_common.c32
2 files changed, 16 insertions, 38 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 9de2fdc8b5e4..a99f0e5243e1 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -153,30 +153,8 @@ size_t ksize(const void *);
#define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN
#define KMALLOC_MIN_SIZE ARCH_DMA_MINALIGN
#define KMALLOC_SHIFT_LOW ilog2(ARCH_DMA_MINALIGN)
-/*
- * The KMALLOC_LOOP_LOW is the definition for the for loop index start number
- * to create the kmalloc_caches object in create_kmalloc_caches(). The first
- * and the second are 96 and 192. You can see that in the kmalloc_index(), if
- * the KMALLOC_MIN_SIZE <= 32, then return 1 (96). If KMALLOC_MIN_SIZE <= 64,
- * then return 2 (192). If the KMALLOC_MIN_SIZE is bigger than 64, we don't
- * need to initialize 96 and 192. Go directly to start the KMALLOC_SHIFT_LOW.
- */
-#if KMALLOC_MIN_SIZE <= 32
-#define KMALLOC_LOOP_LOW 1
-#elif KMALLOC_MIN_SIZE <= 64
-#define KMALLOC_LOOP_LOW 2
-#else
-#define KMALLOC_LOOP_LOW KMALLOC_SHIFT_LOW
-#endif
-
#else
#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)
-/*
- * The KMALLOC_MIN_SIZE of slub/slab/slob is 2^3/2^5/2^3. So, even slab is used.
- * The KMALLOC_MIN_SIZE <= 32. The kmalloc-96 and kmalloc-192 should also be
- * initialized.
- */
-#define KMALLOC_LOOP_LOW 1
#endif
/*
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 9f8d71f78404..983b78694c46 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -855,6 +855,12 @@ void __init setup_kmalloc_cache_index_table(void)
}
}
+static void new_kmalloc_cache(int idx, unsigned long flags)
+{
+ kmalloc_caches[idx] = create_kmalloc_cache(kmalloc_info[idx].name,
+ kmalloc_info[idx].size, flags);
+}
+
/*
* Create the kmalloc array. Some of the regular kmalloc arrays
* may already have been created because they were needed to
@@ -864,25 +870,19 @@ void __init create_kmalloc_caches(unsigned long flags)
{
int i;
- for (i = KMALLOC_LOOP_LOW; i <= KMALLOC_SHIFT_HIGH; i++) {
- if (!kmalloc_caches[i]) {
- kmalloc_caches[i] = create_kmalloc_cache(
- kmalloc_info[i].name,
- kmalloc_info[i].size,
- flags);
- }
+ for (i = KMALLOC_SHIFT_LOW; i <= KMALLOC_SHIFT_HIGH; i++) {
+ if (!kmalloc_caches[i])
+ new_kmalloc_cache(i, flags);
/*
- * "i == 2" is the "kmalloc-192" case which is the last special
- * case for initialization and it's the point to jump to
- * allocate the minimize size of the object. In slab allocator,
- * the KMALLOC_SHIFT_LOW = 5. So, it needs to skip 2^3 and 2^4
- * and go straight to allocate 2^5. If the ARCH_DMA_MINALIGN is
- * defined, it may be larger than 2^5 and here is also the
- * trick to skip the empty gap.
+ * Caches that are not of the two-to-the-power-of size.
+ * These have to be created immediately after the
+ * earlier power of two caches
*/
- if (i == 2)
- i = (KMALLOC_SHIFT_LOW - 1);
+ if (KMALLOC_MIN_SIZE <= 32 && !kmalloc_caches[1] && i == 6)
+ new_kmalloc_cache(1, flags);
+ if (KMALLOC_MIN_SIZE <= 64 && !kmalloc_caches[2] && i == 7)
+ new_kmalloc_cache(2, flags);
}
/* Kmalloc array is now usable */