Re: [PATCH 0/3] try to save some memory for kmem_cache in some cases

[Christoph Lameter]

On Sun, 30 Apr 2017, Wei Yang wrote:

> kmem_cache is a frequently used data in kernel. During the code reading, I
> found maybe we could save some space in some cases.
>
> 1. On 64bit arch, type int will occupy a word if it doesn't sit well.
> 2. cpu_slab->partial is just used when CONFIG_SLUB_CPU_PARTIAL is set
> 3. cpu_partial is just used when CONFIG_SLUB_CPU_PARTIAL is set, while just
> save some space on 32bit arch.

This looks fine. But do we really want to add that amount of ifdeffery?
How much memory does this save?