On Tue, 2010-05-18 at 15:40 -0700, David Miller wrote: > All of the CPP tests like the one used by linux/crypto.h are > ludicrious. It should absolutely be not necessary for any code to > duplicate this kind of calculation. > > Instead, this sequence should be in linux/slab.h, and be used > universally by slab, slub, slob and anything that wants to know the > allocators alignment guarentees. Agreed. However, every arch should -also- set ARCH_KMALLOC_MINALIGN appropriately so that we have documentation of the hardware requirements on each platform. > I don't even know of a 32-bit chip outside of x86 that doesn't > potentially emit alignment requiring 64-bit memory operations for > 64-bit objects. So what SLOB is doing with a different default is > even more strange. And I bet you that even without the requirement, > x86 runs faster with 64-bit alignment of 64-bit objects. No doubt but SLOB explicitly trades faster for smaller. -- Mathematics is the supreme nostalgia of our time. -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
