linux-kernel - 回覆: f2fs F2FS_IOC

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Date: Wed, 20 Mar 2024 23:34:53 +0000
From: Light Hsieh (謝明燈) <Light.Hsieh@...iatek.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>
CC: Ed Tsai (蔡宗軒) <Ed.Tsai@...iatek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-f2fs-devel@...ts.sourceforge.net"
	<linux-f2fs-devel@...ts.sourceforge.net>, "linux-fsdevel@...r.kernel.org"
	<linux-fsdevel@...r.kernel.org>, Chun-Hung Wu (巫駿宏)
	<Chun-hung.Wu@...iatek.com>
Subject: 回覆: f2fs F2FS_IOC_SHUTDOWN hang issue

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>

The case I encounter is f2fs_ic_shutdown with arg  F2FS_GOING_DOWN_FULLSYNC, not  F2FS_GOING_DOWN_NOSYNC.

Or you are meaning that: besides the kernel patch, I need to change the invoked F2FS_IOC_SHUTDOWN to use arg F2FS_GOING_DOWN_NOSYNC?