linux-kernel - Re: [PATCH v2 05/12] cachefiles: add output string to cachefiles_obj_[get|put]_ondemand

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Date: Mon, 20 May 2024 17:02:31 +0800
From: Baokun Li <libaokun@...weicloud.com>
To: Jingbo Xu <jefflexu@...ux.alibaba.com>, netfs@...ts.linux.dev,
 dhowells@...hat.com, jlayton@...nel.org
Cc: hsiangkao@...ux.alibaba.com, zhujia.zj@...edance.com,
 linux-erofs@...ts.ozlabs.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org, yangerkun@...wei.com, houtao1@...wei.com,
 yukuai3@...wei.com, wozizhi@...wei.com, Baokun Li <libaokun1@...wei.com>,
 libaokun@...weicloud.com
Subject: Re: [PATCH v2 05/12] cachefiles: add output string to
 cachefiles_obj_[get|put]_ondemand_fd

On 2024/5/20 15:40, Jingbo Xu wrote:
>
> On 5/15/24 4:45 PM, libaokun@...weicloud.com wrote:
>> From: Baokun Li <libaokun1@...wei.com>
>>
>> This lets us see the correct trace output.
>>
>> Fixes: c8383054506c ("cachefiles: notify the user daemon when looking up cookie")
>> Signed-off-by: Baokun Li <libaokun1@...wei.com>
>
> Could we move this simple fix to the beginning of the patch set?
>
> Reviewed-by: Jingbo Xu <jefflexu@...ux.alibaba.com>
>
Thanks for the review!

This patch is here because when adding trace-related output in the
last patch (path 4), it was found that cachefiles_obj_[get|put]_ondemand_fd
did not have any relevant trace output, so it is added in this patch.
Putting it in the first patch may confuse the reader as to why it was
added, but it is easier to understand with cachefiles_obj_[get|put]_read_req
in front of it.
>> ---
>>   include/trace/events/cachefiles.h | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/include/trace/events/cachefiles.h b/include/trace/events/cachefiles.h
>> index 119a823fb5a0..bb56e3104b12 100644
>> --- a/include/trace/events/cachefiles.h
>> +++ b/include/trace/events/cachefiles.h
>> @@ -130,6 +130,8 @@ enum cachefiles_error_trace {
>>   	EM(cachefiles_obj_see_lookup_failed,	"SEE lookup_failed")	\
>>   	EM(cachefiles_obj_see_withdraw_cookie,	"SEE withdraw_cookie")	\
>>   	EM(cachefiles_obj_see_withdrawal,	"SEE withdrawal")	\
>> +	EM(cachefiles_obj_get_ondemand_fd,      "GET ondemand_fd")      \
>> +	EM(cachefiles_obj_put_ondemand_fd,      "PUT ondemand_fd")      \
>>   	EM(cachefiles_obj_get_read_req,		"GET read_req")		\
>>   	E_(cachefiles_obj_put_read_req,		"PUT read_req")
>>   

-- 
With Best Regards,
Baokun Li