linux-kernel - Re: [PATCH v2 3/3] mm/slub: Use percpu partial free counter

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Date:   Tue, 2 Mar 2021 13:56:46 +0800
From:   Shu Ming <sming56@...il.com>
To:     Xunlei Pang <xlpang@...ux.alibaba.com>
Cc:     Vlastimil Babka <vbabka@...e.cz>, Christoph Lameter <cl@...ux.com>,
        Wen Yang <wenyang@...ux.alibaba.com>,
        Roman Gushchin <guro@...com>, Pekka Enberg <penberg@...il.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        David Rientjes <rientjes@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH v2 3/3] mm/slub: Use percpu partial free counter

On Mon, Aug 10, 2020 at 8:22 PM Xunlei Pang <xlpang@...ux.alibaba.com> wrote:

>  static inline void
> @@ -2429,12 +2439,12 @@ static unsigned long partial_counter(struct kmem_cache_node *n,
>         unsigned long ret = 0;
>
>         if (item == PARTIAL_FREE) {
> -               ret = atomic_long_read(&n->partial_free_objs);
> +               ret = get_partial_free(n);
>         } else if (item == PARTIAL_TOTAL) {
>                 ret = atomic_long_read(&n->partial_total_objs);
>         } else if (item == PARTIAL_INUSE) {
>                 ret = atomic_long_read(&n->partial_total_objs) -
> -               atomic_long_read(&n->partial_free_objs);
> +                               get_partial_free(n);

Is it "ret = get_partial_free(n);" above?


>                 if ((long)ret < 0)
>                         ret = 0;
>         }