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Subject: Re: [RFC 2/2] page_frag_cache: Store metadata in struct page
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From: Alexander Duyck <alexander.duyck@gmail.com>
Date: Thu, 15 Mar 2018 14:26:28 -0700

> So my concern with this patch is that it is essentially trading off
> CPU performance for reduced size. One of the reasons for getting away
> from using the page pointer is because it is expensive to access the
> page when the ref_count is bouncing on multiple cache lines.

Agreed.