linux-kernel - Re: [PATCH 04/21] ext4: get correct ext4_group_info in ext4_mb_prefetch

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Message-ID: <85ab22be-7d91-62f7-b2b5-84f183c73f67@huaweicloud.com>
Date:   Tue, 14 Feb 2023 09:12:20 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     Ojaswin Mujoo <ojaswin@...ux.ibm.com>
Cc:     tytso@....edu, adilger.kernel@...ger.ca, jack@...e.cz,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/21] ext4: get correct ext4_group_info in
 ext4_mb_prefetch_fini



on 2/14/2023 4:14 AM, Ojaswin Mujoo wrote:
> On Mon, Feb 13, 2023 at 08:27:32PM +0800, Kemeng Shi wrote:
>>
>>
>> on 2/13/2023 3:03 PM, Ojaswin Mujoo wrote:
>>> On Fri, Feb 10, 2023 at 03:48:08AM +0800, Kemeng Shi wrote:
>>>> We always get ext4_group_desc with group + 1 and ext4_group_info with
>>>> group to check if we need do initialize ext4_group_info for the group.
>>>> Just get ext4_group_desc with group for ext4_group_info initialization
>>>> check.
>>>>
>>>> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
>>>> ---
>>>>  fs/ext4/mballoc.c | 6 +++---
>>>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
>>>> index 352ac9139fee..f24f80ecf318 100644
>>>> --- a/fs/ext4/mballoc.c
>>>> +++ b/fs/ext4/mballoc.c
>>>> @@ -2570,13 +2570,13 @@ void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
>>>>  			   unsigned int nr)
>>>>  {
>>>>  	while (nr-- > 0) {
>>>> -		struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group,
>>>> -								  NULL);
>>>> -		struct ext4_group_info *grp = ext4_get_group_info(sb, group);
>>>> +		struct ext4_group_desc *gdp;
>>>> +		struct ext4_group_info *grp;
>>>>  
>>>>  		if (!group)
>>>>  			group = ext4_get_groups_count(sb);
>>>>  		group--;
>>>> +		gdp = ext4_get_group_desc(sb, group, NULL);
>>>>  		grp = ext4_get_group_info(sb, group);
>>>>  
>>>>  		if (EXT4_MB_GRP_NEED_INIT(grp) &&
>>>> -- 
>>>> 2.30.0
>>>>
>>>
>>> This is a duplicate of [1] :)
>>>
>>> But I'm okay with this going in as that patchseries might take some time
>>> to get merged. Feel free to add:
>>>
>>> Reviewed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com> 
>>>
>>> [1] https://lore.kernel.org/r/85bbcb3774e38de65b737ef0000241ddbdda73aa.1674822311.git.ojaswin@linux.ibm.com
>>>
>> Hi Ojaswin, Thank you so much to review my code. I 'm sorry that I didn't
>> notice this patch is duplicated and I really appreciate that you allow this
>> one to get merged first. I will add your sign to this patch in next version.
>> Thanks!
> Hi Kemeng,
> 
> So I'm not sure what the norm is when dealing with such duplicate
> patches, but if you do plan to add the Signed-off-by then I'd just like
> to point out that the patch I linked is mainly from Ritesh Harjani, so
> you can pick his Signed-off-by rather than mine.
> 
Sorry that I miss that there are two Signed-off-bys in patch you have already
sent. I will collect both signs to this patch. Thanks!

-- 
Best wishes
Kemeng Shi