On Sat, 19 Oct 2013, JoonSoo Kim wrote: > > Ok so that results in a mininum size object size of 2^(12 - 8) = 2^4 == > > 16 bytes on x86. This is not true for order 1 pages (which SLAB also > > supports) where we need 32 bytes. > > According to current slab size calculating logic, slab whose object size is > less or equal to 16 bytes use only order 0 page. So there is no problem.
Ok then lets add a VM_BUG_ON to detect the situation when someone tries something different. > > Problems may arise on PPC or IA64 where the page size may be larger than > > 64K. With 64K we have a mininum size of 2^(16 - 8) = 256 bytes. For those > > arches we may need 16 bit sized indexes. Maybe make that compile time > > determined base on page size? > 64KByte results in 16 bit sized indexes? > > Okay. I will try it. Again compile time. You had runtime in some earlier patches which adds new branches to key functions. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
