On Wed, 2011-04-13 at 15:33 -0700, Nishanth Aravamudan wrote: > PAPR specifies that DTL buffers can not cross AMS environments (aka CMO > in the PAPR) and can not cross a memory entitlement granule boundary > (4k). This is found in section 14.11.3.2 H_REGISTER_VPA of the PAPR. > kmalloc does not guarantee an alignment of the allocation, though, > beyond 8 bytes (at least in my understanding). Over-allocate and align > the resulting address.
You can specify alignment by creating your own kmem_cache, ie. kmem_cache_create(). Obviously there will be some overhead to create the cache structure, but I'd think it will be less than 4k * NR_CPUs. cheers
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