linux-kernel - Re: [PATCH v2 0/5] slab cleanups

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Message-ID: <CANpmjNNv8+frHPdvT=0ZNuz5phUy1WRanJ6DkiiNvDTBtFraAQ@mail.gmail.com>
Date:   Fri, 4 Mar 2022 12:50:21 +0100
From:   Marco Elver <elver@...gle.com>
To:     Hyeonggon Yoo <42.hyeyoo@...il.com>
Cc:     linux-mm@...ck.org, Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew WilCox <willy@...radead.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/5] slab cleanups

On Fri, 4 Mar 2022 at 07:34, Hyeonggon Yoo <42.hyeyoo@...il.com> wrote:
>
> Changes from v1:
>         Now SLAB passes requests larger than order-1 page
>         to page allocator.
>
>         Adjusted comments from Matthew, Vlastimil, Rientjes.
>         Thank you for feedback!
>
>         BTW, I have no idea what __ksize() should return when an object that
>         is not allocated from slab is passed. both 0 and folio_size()
>         seems wrong to me.

Didn't we say 0 would be the safer of the two options?
https://lkml.kernel.org/r/0e02416f-ef43-dc8a-9e8e-50ff63dd3c61@suse.cz

> Hello, these are cleanup patches for slab.
> Please consider them for slab-next :)
>
> Any comments will be appreciated.
> Thanks.
>
> Hyeonggon Yoo (5):
>   mm/slab: kmalloc: pass requests larger than order-1 page to page
>     allocator
>   mm/sl[au]b: unify __ksize()
>   mm/sl[auo]b: move definition of __ksize() to mm/slab.h
>   mm/slub: limit number of node partial slabs only in cache creation
>   mm/slub: refactor deactivate_slab()
>
>  include/linux/slab.h |  36 ++++++------
>  mm/slab.c            |  51 ++++++++---------
>  mm/slab.h            |  21 +++++++
>  mm/slab_common.c     |  20 +++++++
>  mm/slob.c            |   1 -
>  mm/slub.c            | 130 ++++++++++++-------------------------------
>  6 files changed, 114 insertions(+), 145 deletions(-)
>
> --
> 2.33.1
>