>>>>> On Tue, 19 Oct 2004 18:59:01 +0200, Ralf Baechle <ralf@xxxxxxxxxxxxxx> said: ralf> The alignment needs to be large enough to store an arbitrary ralf> fundamental data type including the 64-bit types such as long ralf> long or double. ralf> cache_line_size() is only used if a slab has SLAB_HWCACHE_ALIGN ralf> set. SLAB_HWCACHE_ALIGN is default ARCH_KMALLOC_FLAGS, so normal kmalloc will use cache_line_size() (if no ARCH_KMALLOC_MINALIGN). ralf> The alignment requirements are documented in ralf> Documentation/DMA-API.txt and they are specified the way they ralf> are for good reason. Hmm... I had been thought of many PCI ether driver (which maps skbuff), but I found skb_init() calls kmem_cache_create with SLAB_HWCACHE_ALIGN. Maybe I should learn much about it... Thank you.
