linux-kernel - Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.

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Message-ID: <725e972f-2014-405b-a056-611c13e95f20@huawei.com>
Date: Thu, 7 Nov 2024 17:21:55 +0800
From: Zizhi Wo <wozizhi@...wei.com>
To: "Darrick J. Wong" <djwong@...nel.org>
CC: <chandan.babu@...cle.com>, <dchinner@...hat.com>, <osandov@...com>,
	<john.g.garry@...cle.com>, <linux-xfs@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <yangerkun@...wei.com>
Subject: Re: [PATCH 0/2] Some boundary error bugfix related to XFS fsmap.



在 2024/10/9 21:01, Zizhi Wo 写道:
> Hi!
> 
> Here are two patches that address fsmap statistics errors. I sent out
> this version in August, and I hope someone can take some time to review
> them. So friendly ping. Thanks in advance!

friendly ping again（￣。。￣）

> 
> 
> 在 2024/9/3 3:08, Darrick J. Wong 写道:
>> On Thu, Aug 29, 2024 at 07:24:55PM +0800, Zizhi Wo wrote:
>>> friendly ping
>>
>> Sorry, I'm not going to get to this until late September.
>>
>> --D
>>
>>> 在 2024/8/26 11:10, Zizhi Wo 写道:
>>>> Prior to this, I had already sent out a patchset related to xfs fsmap
>>>> bugfix, which mainly introduced "info->end_daddr" to fix omitted 
>>>> extents[1]
>>>> and Darrick had already sent out a patchbomb for merging into 
>>>> stable[2],
>>>> which included my previous patches.
>>>>
>>>> However, I recently discovered two new fsmap problems...What follows 
>>>> is a
>>>> brief description of them:
>>>>
>>>> Patch 1: In this scenario, fsmap lost one block count. The root 
>>>> cause is
>>>> that during the calculation of highkey, the calculation of 
>>>> start_block is
>>>> missing an increment by one, which leads to the last query missing one
>>>> This problem is resolved by adding a sentinel node.
>>>>
>>>> Patch 2: In this scenario, the fsmap query for realtime deivce may 
>>>> display
>>>> extra intervals. This is due to an extra increase in "end_rtb". The 
>>>> issue
>>>> is resolved by adjusting the relevant calculations. And this patch 
>>>> depends
>>>> on the previous patch that introduced "info->end_daddr".
>>>>
>>>> [1] 
>>>> https://lore.kernel.org/all/20240819005320.304211-1-wozizhi@huawei.com/
>>>> [2] 
>>>> https://lore.kernel.org/all/172437083728.56860.10056307551249098606.stgit@frogsfrogsfrogs/
>>>>
>>>> Zizhi Wo (2):
>>>>     xfs: Fix missing block calculations in xfs datadev fsmap
>>>>     xfs: Fix incorrect parameter calculation in rt fsmap
>>>>
>>>>    fs/xfs/libxfs/xfs_rtbitmap.c |  4 +---
>>>>    fs/xfs/xfs_fsmap.c           | 39 
>>>> +++++++++++++++++++++++++++++++-----
>>>>    2 files changed, 35 insertions(+), 8 deletions(-)
>>>>
>>>
>>
> 
>