On Fri, 31 Oct 2014, Joonsoo Kim wrote: > alloc_unbound_pwq() allocates slab object from pool_workqueue. This > kmem_cache requires 256 bytes alignment, but, current merging code > doesn't honor that, and merge it with kmalloc-256. kmalloc-256 requires > only cacheline size alignment so that above failure occurs. However, > in x86, kmalloc-256 is luckily aligned in 256 bytes, so the problem > didn't happen on it. That luck will run out when you enable debugging. But then that also usually means disablign merging. > To fix this problem, this patch introduces alignment mismatch check > in find_mergeable(). This will fix the problem. Acked-by: Christoph Lameter <cl@xxxxxxxxx>
