Re: [PATCH 2/6] x86: hv: hv_init.c: Replace alloc_page() with kmem_cache_alloc()

[Vitaly Kuznetsov]

Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> writes:

> I would worry that kmem_cache_alloc does not currently have same alignment constraints.
> See discussion here:
> https://lwn.net/SubscriberLink/787740/a886fe4ea6681322/

I think it even was me who reported this bug with XFS originally :-) 

Yes, plain kmalloc() doesn't give you alignment guarantees (it is very
easy to prove, e.g. with CONFIG_KASAN), however, kmem_cache_create() (and
dma_pool_create() to that matter) has explicit 'align' parameter and it
is a bug if it is not respected.

-- 
Vitaly