Re: [PATCH 5/5] kern: make struct kmem_cache fit into two cache lines

[Ludovic Courtès]

Justus Winter <4winter@informatik.uni-hamburg.de> skribis:

> Previously, the size of struct kmem_cache was 136 bytes, just eight
> bytes larger than 128 bytes, which is typically two cache lines on
> today's CPUs.
>
> By reducing the size of the name field which holds a human-readable
> description by eight bytes to 24 bytes, the struct kmem_cache can be
> made fit into two cache lines.  This change should not affect the
> usefulness of this field.  For reference, the length of the largest
> hard-coded name is 17.

I think it’d be worth keeping the explanation in a comment above the
macro definition.

Ludo’.