# RE: \[PATCH 3/3 v3\] net/macb: Try to optimize struct macb layout

- From: David Laight \<hidden\>
- Date: 2013-05-15 09:39:03 
- List: netdev
- Page: https://ratatoskr.run/netdev/2013/05/4049683
- Thread: https://ratatoskr.run/netdev/2013/05/4049669/t.md

```text
> From: Havard Skinnemoen <redacted>

> Move the NAPI struct below that since it is used
> from the interrupt handler. This field is also marked as
> ___cacheline_aligned_in_smp.

Is that a good idea if the cache line size is 256 bytes?
Indeed is that ever sane - except for a few special structures
that really need it, and are guaranteed to be allocated
with that much alignment.

	David
```