Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Content-Type: text/plain;
        charset=us-ascii
MIME-Version: 1.0
Subject: Re: [PATCH v2 01/47] mm: vmscan: move shrinker-related code into a
 separate file
From:   Muchun Song <muchun.song@linux.dev>
In-Reply-To: <20230724094354.90817-2-zhengqi.arch@bytedance.com>
Date:   Tue, 25 Jul 2023 10:35:01 +0800
Cc:     Andrew Morton <akpm@linux-foundation.org>, david@fromorbit.com,
        tkhai@ya.ru, Vlastimil Babka <vbabka@suse.cz>,
        Roman Gushchin <roman.gushchin@linux.dev>, djwong@kernel.org,
        Christian Brauner <brauner@kernel.org>,
        "Paul E. McKenney" <paulmck@kernel.org>, tytso@mit.edu,
        steven.price@arm.com, cel@kernel.org,
        Sergey Senozhatsky <senozhatsky@chromium.org>,
        yujie.liu@intel.com, Greg KH <gregkh@linuxfoundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        x86@kernel.org, kvm@vger.kernel.org,
        xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org,
        linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com,
        linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org,
        rcu@vger.kernel.org, netdev <netdev@vger.kernel.org>,
        dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
        dm-devel@redhat.com, linux-raid@vger.kernel.org,
        linux-bcache@vger.kernel.org,
        virtualization@lists.linux-foundation.org,
        linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
        linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org
Content-Transfer-Encoding: quoted-printable
Message-Id: <97E80C37-8872-4C5A-A027-A0B35F39152A@linux.dev>
References: <20230724094354.90817-1-zhengqi.arch@bytedance.com>
 <20230724094354.90817-2-zhengqi.arch@bytedance.com>
To:     Qi Zheng <zhengqi.arch@bytedance.com>
Precedence: bulk


> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch@bytedance.com> =
wrote:
>=20
> The mm/vmscan.c file is too large, so separate the shrinker-related
> code from it into a separate file. No functional changes.
>=20
> Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
> ---
> include/linux/shrinker.h |   3 +
> mm/Makefile              |   4 +-
> mm/shrinker.c            | 707 +++++++++++++++++++++++++++++++++++++++
> mm/vmscan.c              | 701 --------------------------------------
> 4 files changed, 712 insertions(+), 703 deletions(-)
> create mode 100644 mm/shrinker.c
>=20
> diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
> index 224293b2dd06..961cb84e51f5 100644
> --- a/include/linux/shrinker.h
> +++ b/include/linux/shrinker.h
> @@ -96,6 +96,9 @@ struct shrinker {
>  */
> #define SHRINKER_NONSLAB (1 << 3)
>=20
> +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup =
*memcg,
> +			   int priority);

A good cleanup, vmscan.c is so huge.

I'd like to introduce a new header in mm/ directory and contains those
declarations of functions (like this and other debug function in
shrinker_debug.c) since they are used internally across mm.

Thanks.