linux-kernel - Re: [RFC 07/26] mm, slub: return slab page from get

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Date:   Tue, 25 May 2021 11:12:17 +0200 (CEST)
From:   Christoph Lameter <cl@...two.de>
To:     Vlastimil Babka <vbabka@...e.cz>
cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        David Rientjes <rientjes@...gle.com>,
        Pekka Enberg <penberg@...nel.org>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>
Subject: Re: [RFC 07/26] mm, slub: return slab page from get_partial() and
 set c->page afterwards

On Tue, 25 May 2021, Vlastimil Babka wrote:

> The function get_partial() finds a suitable page on a partial list, acquires
> and returns its freelist and assigns the page pointer to kmem_cache_node.
	in kmem_cache_cpu ??

> In later patch we will need more control over the kmem_cache_node assignment,

kmem_cache_cpu?

> so instead return the page pointer to get_partial()'s caller and assign it
> there. No functional change as all of this still happens with disabled irq.

Instead of passing a kmem_cache_cpu pointer pass a pointer to a pointer to
a page ....