linux-kernel - Re: [PATCH 2/3] mm/slub: wrap cpu_slab->partial in CONFIG_SLUB_CPU

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Message-ID: <20170501143930.GJ27790@bombadil.infradead.org>
Date:   Mon, 1 May 2017 07:39:30 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Wei Yang <richard.weiyang@...il.com>
Cc:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] mm/slub: wrap cpu_slab->partial in
 CONFIG_SLUB_CPU_PARTIAL

On Mon, May 01, 2017 at 04:20:05PM +0800, Wei Yang wrote:
> I have tried to replace the code with slub_cpu_partial(), it works fine on
> most of cases except two:
> 
> 1. slub_cpu_partial(c) = page->next;

New accessor: slub_set_cpu_partial(c, p)

> 2. page = READ_ONCE(slub_cpu_partial(c));

OK, that one I haven't seen an existing pattern for yet.
slub_cpu_partial_read_once(c)?