linux-ext4 - Re: [PATCH v6 03/11] ext4: extent ext4_mb_mark_context to support allocation under journal

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Date:   Thu, 31 Aug 2023 21:21:00 +0530
From:   Ritesh Harjani (IBM) <ritesh.list@...il.com>
To:     Kemeng Shi <shikemeng@...weicloud.com>, tytso@....edu,
        adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 03/11] ext4: extent ext4_mb_mark_context to support allocation under journal

Kemeng Shi <shikemeng@...weicloud.com> writes:

commit: extent ext4_mb_mark_context to support allocation under journal
        ^^^ extend

> Previously, ext4_mb_mark_context is only called under fast commit
> replay path, so there is no valid handle when we update block bitmap
> and group descriptor. This patch try to extent ext4_mb_mark_context

                                          ^^^^ extend

> to be used by code under journal. There are several improves:
                                                       ^^^ improvement:            
> 1. add "handle_t *handle" to struct ext4_mark_context to accept handle
> to journal block bitmap and group descriptor update inside
> ext4_mb_mark_context (the added journal caode is based on journal
                                          ^^^ code
                            (we can remove the next "journal code in")

> code in ext4_mb_mark_diskspace_used where ext4_mb_mark_context
> is going to be used.)
> 2. add EXT4_MB_BITMAP_MARKED_CHECK flag to control check if bits in block
> bitmap are already marked as allocation code under journal asserts that
> all bits to be changed are not marked before.
> 3. add "ext4_grpblk_t changed" to struct ext4_mark_context to notify number
> of bits in block bitmap has changed.
>
> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
> Reviewed-by: Ojaswin Mujoo <ojaswin@...ux.ibm.com>

The patch functionally looks good to me. Please feel free to add - 

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@...il.com>


-ritesh