diff options
Diffstat (limited to 'include/linux/slab.h')
| -rw-r--r-- | include/linux/slab.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index ffd24c830151..96f0ea506b5c 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -153,8 +153,30 @@ 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 /* |