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Message-ID: <d2621ad0-8b99-9154-5ff5-509dec2f32a3@bytedance.com>
Date:   Tue, 25 Jul 2023 11:09:07 +0800
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Subject: Re: [PATCH v2 01/47] mm: vmscan: move shrinker-related code into a
 separate file
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To:     Muchun Song <muchun.song@linux.dev>
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>,
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References: <20230724094354.90817-1-zhengqi.arch@bytedance.com>
 <20230724094354.90817-2-zhengqi.arch@bytedance.com>
 <97E80C37-8872-4C5A-A027-A0B35F39152A@linux.dev>
From:   Qi Zheng <zhengqi.arch@bytedance.com>
In-Reply-To: <97E80C37-8872-4C5A-A027-A0B35F39152A@linux.dev>
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On 2023/7/25 10:35, Muchun Song wrote:
> 
> 
>> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch@bytedance.com> wrote:
>>
>> The mm/vmscan.c file is too large, so separate the shrinker-related
>> code from it into a separate file. No functional changes.
>>
>> 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
>>
>> 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)
>>
>> +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.

How about putting them in the mm/internal.h file?

> 
> Thanks.
>