linux-kernel - Re: [PATCH v4 11/11] ext4: Atomic write test for extent split across leaf nodes

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Message-ID: <eebb6771-a668-430b-939a-ef0d5d966905@oracle.com>
Date: Thu, 21 Aug 2025 10:23:02 +0100
From: John Garry <john.g.garry@...cle.com>
To: Ojaswin Mujoo <ojaswin@...ux.ibm.com>
Cc: Zorro Lang <zlang@...hat.com>, fstests@...r.kernel.org,
        Ritesh Harjani <ritesh.list@...il.com>, djwong@...nel.org,
        tytso@....edu, linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v4 11/11] ext4: Atomic write test for extent split across
 leaf nodes

On 21/08/2025 09:25, Ojaswin Mujoo wrote:
> Anyways, yes I've added the $DEBUGFS command so we can observe the
> extent structure, but the filefrag would look something like this (last
> few extents):
> 
>   ...
>   337:      674..     674:      10130..     10130:      1:
>   338:      676..     676:      10132..     10132:      1:
>   339:      678..     678:      10134..     10134:      1:
>   340:      679..     680:      10135..     10136:      2:             last,eof
> 
> Notice that the last 2 extents are logically and physically continuous
> but not merged.

I see, thanks for the example!