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

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Date:   Tue, 14 Feb 2023 01:44:47 +0530
From:   Ojaswin Mujoo <ojaswin@...ux.ibm.com>
To:     Kemeng Shi <shikemeng@...weicloud.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 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.

Thanks,
ojaswin
> 
> -- 
> Best wishes
> Kemeng Shi
>