Subject: Re: [PATCH RESEND net 3/7] net: hns3: Resolved the issue that the debugfs query result is inconsistent.

From: Jakub Kicinski <[email-masked]>
Date: Mon, 11 Nov 2024 17:25:11 -0800

On Thu, 7 Nov 2024 21:30:19 +0800 Jijie Shao wrote:
> Subject: [PATCH RESEND net 3/7] net: hns3: Resolved the issue that the debugfs query result is inconsistent.
> Date: Thu, 7 Nov 2024 21:30:19 +0800
> X-Mailer: git-send-email 2.30.0
> 
> From: Hao Lan <[email-masked]>
> 
> This patch modifies the implementation of debugfs:
> When the user process stops unexpectedly, not all data of the file system
> is read. In this case, the save_buf pointer is not released. When the user
> process is called next time, save_buf is used to copy the cached data
> to the user space. As a result, the queried data is inconsistent. To solve
> this problem, determine whether the function is invoked for the first time
> based on the value of *ppos. If *ppos is 0, obtain the actual data.

What do you mean by "inconsistent" ?
What if two processes read the file at once?