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From: David Miller <davem@davemloft.net>
Subject: Re: [RFC v3 net-next 13/18] net/sched: Introduce the TBS Qdisc
Date: Tue, 24 Apr 2018 09:50:48 -0400 (EDT)
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From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 24 Apr 2018 10:50:04 +0200 (CEST)

> So adding 8 bytes to spare duplicated code will not change the kmem_cache
> object size and I really doubt that anyone will notice.

It's about where the cache lines end up when each and every byte is added
to the structure, not just the slab object size.