linux-kernel - Re: [PATCH v1 1/2] mm/damon: rename sz_damon_region to damon_region

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Date:   Tue, 27 Sep 2022 08:04:49 +0800
From:   haoxin <xhao@...ux.alibaba.com>
To:     SeongJae Park <sj@...nel.org>
Cc:     akpm@...ux-foundation.org, damon@...ts.linux.dev,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] mm/damon: rename sz_damon_region to
 damon_region_size


在 2022/9/27 上午12:16, SeongJae Park 写道:
> On Mon, 26 Sep 2022 15:10:59 +0800 Xin Hao <xhao@...ux.alibaba.com> wrote:
>
>> Here, i rename sz_damon_region() to damon_region_size(), and move it to
>> "include/linux/damon.h", because in many places, we can to use this func.
> Good idea.
>
>> Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
>> ---
>>   include/linux/damon.h | 1 +
>>   mm/damon/core.c       | 6 +++---
>>   2 files changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/include/linux/damon.h b/include/linux/damon.h
>> index ed5470f50bab..21f4bfd0f41f 100644
>> --- a/include/linux/damon.h
>> +++ b/include/linux/damon.h
>> @@ -524,6 +524,7 @@ void damon_add_region(struct damon_region *r, struct damon_target *t);
>>   void damon_destroy_region(struct damon_region *r, struct damon_target *t);
>>   int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges,
>>   		unsigned int nr_ranges);
>> +unsigned long damon_region_size(struct damon_region *r);
> This name looks good enough, but I'd like to suggest damon_sz_region().  What
> do you think?
Yes,  the fisrt  i named damon_sz_region, but later i changed it to 
damon_region_size, so i will change it back.
>
> Also, I'd like to keep this function 'static inline' and put the definition
> just after that of 'damon_first_region()'.
Ok, thanks
>
>
> Thanks,
> SJ
>
>>   struct damos *damon_new_scheme(struct damos_access_pattern *pattern,
>>   			enum damos_action action, struct damos_quota *quota,
>> diff --git a/mm/damon/core.c b/mm/damon/core.c
>> index 4de8c7c52979..74ab45b2c2f1 100644
>> --- a/mm/damon/core.c
>> +++ b/mm/damon/core.c
>> @@ -864,7 +864,7 @@ static void kdamond_apply_schemes(struct damon_ctx *c)
>>   	}
>>   }
>>
>> -static inline unsigned long sz_damon_region(struct damon_region *r)
>> +unsigned long damon_region_size(struct damon_region *r)
>>   {
>>   	return r->ar.end - r->ar.start;
>>   }
>> @@ -875,7 +875,7 @@ static inline unsigned long sz_damon_region(struct damon_region *r)
>>   static void damon_merge_two_regions(struct damon_target *t,
>>   		struct damon_region *l, struct damon_region *r)
>>   {
>> -	unsigned long sz_l = sz_damon_region(l), sz_r = sz_damon_region(r);
>> +	unsigned long sz_l = damon_region_size(l), sz_r = damon_region_size(r);
>>
>>   	l->nr_accesses = (l->nr_accesses * sz_l + r->nr_accesses * sz_r) /
>>   			(sz_l + sz_r);
>> @@ -904,7 +904,7 @@ static void damon_merge_regions_of(struct damon_target *t, unsigned int thres,
>>
>>   		if (prev && prev->ar.end == r->ar.start &&
>>   		    abs(prev->nr_accesses - r->nr_accesses) <= thres &&
>> -		    sz_damon_region(prev) + sz_damon_region(r) <= sz_limit)
>> +		    damon_region_size(prev) + damon_region_size(r) <= sz_limit)
>>   			damon_merge_two_regions(t, prev, r);
>>   		else
>>   			prev = r;
>> --
>> 2.31.0
>>