netdev - Re: [PATCH v2 01/47] mm: vmscan: move shrinker-related code into a separate file

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Date: Tue, 25 Jul 2023 11:09:07 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
To: Muchun Song <muchun.song@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, david@...morbit.com,
 tkhai@...ru, Vlastimil Babka <vbabka@...e.cz>,
 Roman Gushchin <roman.gushchin@...ux.dev>, djwong@...nel.org,
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 <paulmck@...nel.org>, tytso@....edu, steven.price@....com, cel@...nel.org,
 Sergey Senozhatsky <senozhatsky@...omium.org>, yujie.liu@...el.com,
 Greg KH <gregkh@...uxfoundation.org>, LKML <linux-kernel@...r.kernel.org>,
 Linux Memory Management List <linux-mm@...ck.org>, x86@...nel.org,
 kvm@...r.kernel.org, xen-devel@...ts.xenproject.org,
 linux-erofs@...ts.ozlabs.org, linux-f2fs-devel@...ts.sourceforge.net,
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Subject: Re: [PATCH v2 01/47] mm: vmscan: move shrinker-related code into a
 separate file

On 2023/7/25 10:35, Muchun Song wrote:
> 
> 
>> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch@...edance.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@...edance.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.
>