Subject: Re: [PATCH 04/21] ext4: get correct ext4_group_info in
 ext4_mb_prefetch_fini
To:     Ojaswin Mujoo <ojaswin@linux.ibm.com>
Cc:     tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz,
        linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20230209194825.511043-1-shikemeng@huaweicloud.com>
 <20230209194825.511043-5-shikemeng@huaweicloud.com>
 <Y+ngxf4fBbhPBHPk@li-bb2b2a4c-3307-11b2-a85c-8fa5c3a69313.ibm.com>
From:   Kemeng Shi <shikemeng@huaweicloud.com>
Message-ID: <51940a4e-b01d-cef8-af35-87788df483f1@huaweicloud.com>
Date:   Mon, 13 Feb 2023 20:27:32 +0800
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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@huaweicloud.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@linux.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!

-- 
Best wishes
Kemeng Shi