linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: avoid the deadlock case when stopping discard thread

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Message-ID: <cc93e2d8-88c4-45ae-bbc9-9ec112bd312d@kernel.org>
Date: Wed, 20 Mar 2024 23:32:46 +0800
From: Chao Yu <chao@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>, linux-kernel@...r.kernel.org,
 linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: avoid the deadlock case when stopping
 discard thread

On 2024/3/20 8:14, Jaegeuk Kim wrote:
> f2fs_ioc_shutdown(F2FS_GOING_DOWN_NOSYNC)  issue_discard_thread
>   - mnt_want_write_file()
>     - sb_start_write(SB_FREEZE_WRITE)
>                                               - sb_start_intwrite(SB_FREEZE_FS);
>   - f2fs_stop_checkpoint(sbi, false,            : waiting
>      STOP_CP_REASON_SHUTDOWN);
>   - f2fs_stop_discard_thread(sbi);
>     - kthread_stop()
>       : waiting
> 
>   - mnt_drop_write_file(filp);
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,