Messages in this thread | | | Date | Fri, 31 Oct 2014 10:17:16 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [PATCH for v3.18] mm/slab: fix unalignment problem on Malta with EVA due to slab merge |
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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@linux.com>
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