linux-kernel - Re: [PATCH] tools/mm/page_owner

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Message-ID: <51f86d0e-e9dc-42ef-baee-0dfdd39b7cab@linux.dev>
Date: Fri, 17 Oct 2025 09:19:09 +0800
From: Ye Liu <ye.liu@...ux.dev>
To: SeongJae Park <sj@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Ye Liu <liuye@...inos.cn>,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools/mm/page_owner_sort: add help option support



在 2025/10/17 04:10, SeongJae Park 写道:
> On Thu, 16 Oct 2025 13:49:25 +0800 Ye Liu <ye.liu@...ux.dev> wrote:
> 
>> From: Ye Liu <liuye@...inos.cn>
>>
>> Add -h/--help option to display usage information and improve code style.
> 
> Looks good to me, though I have a trivial comment below.
> 
>>
>> Signed-off-by: Ye Liu <liuye@...inos.cn>
>> ---
>>  tools/mm/page_owner_sort.c | 10 +++++++---
>>  1 file changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/tools/mm/page_owner_sort.c b/tools/mm/page_owner_sort.c
>> index 880e36df0c11..202eafed66a9 100644
>> --- a/tools/mm/page_owner_sort.c
>> +++ b/tools/mm/page_owner_sort.c
>> @@ -669,14 +669,15 @@ int main(int argc, char **argv)
>>  		{ "pid", required_argument, NULL, 1 },
>>  		{ "tgid", required_argument, NULL, 2 },
>>  		{ "name", required_argument, NULL, 3 },
>> -		{ "cull",  required_argument, NULL, 4 },
>> -		{ "sort",  required_argument, NULL, 5 },
>> +		{ "cull", required_argument, NULL, 4 },
>> +		{ "sort", required_argument, NULL, 5 },
> 
> Seems unnecessary changes.
The spacing changes fix inconsistent formatting in longopts array.
Since the format fixes are simple and in the same context, I put them together.
If you insist on removing these changes, I will drop them in the next version.> 
>> +		{ "help", no_argument, NULL, 'h' },
>>  		{ 0, 0, 0, 0},
>>  	};
>>  
>>  	compare_flag = COMP_NO_FLAG;
>>  
>> -	while ((opt = getopt_long(argc, argv, "admnpstP", longopts, NULL)) != -1)
>> +	while ((opt = getopt_long(argc, argv, "admnpstPh", longopts, NULL)) != -1)
>>  		switch (opt) {
>>  		case 'a':
>>  			compare_flag |= COMP_ALLOC;
>> @@ -702,6 +703,9 @@ int main(int argc, char **argv)
>>  		case 'n':
>>  			compare_flag |= COMP_COMM;
>>  			break;
>> +		case 'h':
>> +			usage();
>> +			exit(0);
>>  		case 1:
>>  			filter = filter | FILTER_PID;
>>  			fc.pids = parse_nums_list(optarg, &fc.pids_size);
>> -- 
>> 2.43.0
> 
> If you remove the unnecessary changes, please feel free to add below:
> 
> Reviewed-by: SeongJae Park <sj@...nel.org>
> 
> 
> Thanks,
> SJ

-- 
Thanks,
Ye Liu