On 06/05/2017 08:27 PM, David Miller wrote:
From: jane.chu@xxxxxxxxxx
Date: Mon, 5 Jun 2017 20:03:28 -0700
On sun4v sparc, it looks like kzalloc(64, GFP_KERNEL) ends up
allocating from kmalloc_caches[6] - a 64-byte kmem-cache allocated
by kmem_cache_init() with SLAB_HWCACHE_ALIGN flag set, so it's in
l3-cache-line-size alignment, i.e. 64byte. I printed out the
'mondo' pa and verified that.
Please check this, because that is an implementation detail. We have
three SLAB allocators.
For example, if the user enables SLOB, I bet you don't get that
alignment.
The only thing we are universally guaranteed is ARCH_KMALLOC_MINALIGN.
Please implement this properly, rather than relying upon things like
the above.
Good point, agreed. I will update the patch.
thanks!
-jane
Thank you.
--
To unsubscribe from this list: send the line "unsubscribe sparclinux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
