Re: [PATCH 0/2] Fix two issues about swapext

[yebin <yebin@huaweicloud.com>]

On 2025/12/15 13:37, Christoph Hellwig wrote:
> Can you add a sentence or two here how you found the issue?
>

First, we encountered the issue described in 
https://access.redhat.com/solutions/6095011 in our production 
environment.The triggered scenario is that after performing fragmented 
organization, the system suddenly lost power and reset, and then 
encountered a panic when mounting the XFS file system.
After analyzing the vmcore, we identified the cause of the issue. 
Subsequently, while reproducing the issue on linux-next, we also 
discovered the problem described in PATCH[1].

> Any chance you could add a reproducer to xfstests?
>
Yes, this issue is quite reproducible. It occurs inevitably when 
following certain steps. This problem has existed for a long time. I 
think the reason it's not easily detected is that the XFS_IOC_SWAPEXT 
IOCTL command is generally used during defragmentation. Therefore, it is 
almost never included in typical log replay scenarios.
>