linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: Prevent s_writer rw_sem count mismatch in f2fs_evict

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Date: Sun, 14 Apr 2024 15:32:45 +0000
From: patchwork-bot+f2fs@...nel.org
To: Yeongjin Gil <youngjin.gil@...sung.com>
Cc: jaegeuk@...nel.org, chao@...nel.org, sj1557.seo@...sung.com,
 linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: Prevent s_writer rw_sem count mismatch in
 f2fs_evict_inode

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@...nel.org>:

On Fri, 22 Mar 2024 13:16:39 +0900 you wrote:
> If f2fs_evict_inode is called between freeze_super and thaw_super, the
> s_writer rwsem count may become negative, resulting in hang.
> 
> CPU1                       CPU2
> 
> f2fs_resize_fs()           f2fs_evict_inode()
>   f2fs_freeze
>     set SBI_IS_FREEZING
>                              skip sb_start_intwrite
>   f2fs_unfreeze
>     clear SBI_IS_FREEZING
>                              sb_end_intwrite
> 
> [...]

Here is the summary with links:
  - [f2fs-dev] f2fs: Prevent s_writer rw_sem count mismatch in f2fs_evict_inode
    https://git.kernel.org/jaegeuk/f2fs/c/3127f1010c9b

You are awesome, thank you!
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