linux-kernel - Re: [PATCH 12/13] ext4: remove unnecessary check for avoiding multiple update_backups in ext4_flex_group

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Message-ID: <2a0c45d9-29f0-10a3-fc40-d48e101c8d91@huaweicloud.com>
Date:   Thu, 17 Aug 2023 11:53:52 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     Theodore Ts'o <tytso@....edu>
Cc:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/13] ext4: remove unnecessary check for avoiding
 multiple update_backups in ext4_flex_group_add



on 8/16/2023 11:47 AM, Theodore Ts'o wrote:
> On Thu, Jun 29, 2023 at 08:00:43PM +0800, Kemeng Shi wrote:
>> Commit 0acdb8876fead ("ext4: don't call update_backups() multiple times
>> for the same bg") add check in ext4_flex_group_add to avoid call
>> update_backups multiple times for block group descriptors in the same
>> group descriptor block. However, we have already call update_backups in
>> block step, so the added check is unnecessary.
> 
> I'm having trouble understaind this comit.  What do you mean by the
> "block step" in the last paragraph?
> 
Sorry for the confusing stuff. I mean we foreach in group descriptor block
step instead of foreach in group descriptor step to update backup.
So there is no chance to call update_backups for different descriptors
in the same bg.

> 					- Ted
>