linux-kernel - Re: [PATCH] f2fs: add REQ_TIME time update for some user behaviors

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Date: Thu, 14 Mar 2024 21:06:14 +0800
From: Chao Yu <chao@...nel.org>
To: Zhiguo Niu <zhiguo.niu@...soc.com>, jaegeuk@...nel.org
Cc: linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
 niuzhiguo84@...il.com, ke.wang@...soc.com, hongyu.jin@...soc.com
Subject: Re: [PATCH] f2fs: add REQ_TIME time update for some user behaviors

On 2024/3/13 12:11, Zhiguo Niu wrote:
> some user behaviors requested filesystem operations, which
> will cause filesystem not idle.
> Meanwhile adjust f2fs_update_time(REQ_TIME) of
> f2fs_ioc_defragment to successful case.
> 
> Signed-off-by: Zhiguo Niu <zhiguo.niu@...soc.com>
> ---
>   fs/f2fs/file.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 4dfe38e..dac3836 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -2784,7 +2784,6 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
>   	err = f2fs_defragment_range(sbi, filp, &range);
>   	mnt_drop_write_file(filp);
>   
> -	f2fs_update_time(sbi, REQ_TIME);

I guess we need to call f2fs_update_time() here if any data was
migrated.

if (range->len)
	f2fs_update_time(sbi, REQ_TIME);

>   	if (err < 0)
>   		return err;
>   
> @@ -2792,6 +2791,7 @@ static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
>   							sizeof(range)))
>   		return -EFAULT;
>   
> +	f2fs_update_time(sbi, REQ_TIME);
>   	return 0;
>   }
>   
> @@ -3331,6 +3331,7 @@ static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
>   	if (copy_from_user(&block_count, (void __user *)arg,
>   			   sizeof(block_count)))
>   		return -EFAULT;
> +	f2fs_update_time(sbi, REQ_TIME);

There will be no further IO in the end of f2fs_ioc_resize_fs(), so we don't
need to update time to delay gc/discard thread?

>   
>   	return f2fs_resize_fs(filp, block_count);
>   }
> @@ -3424,6 +3425,7 @@ static int f2fs_ioc_setfslabel(struct file *filp, unsigned long arg)
>   	f2fs_up_write(&sbi->sb_lock);
>   
>   	mnt_drop_write_file(filp);
> +	f2fs_update_time(sbi, REQ_TIME);

Ditto,

Thanks,

>   out:
>   	kfree(vbuf);
>   	return err;
> @@ -3597,6 +3599,7 @@ static int f2fs_release_compress_blocks(struct file *filp, unsigned long arg)
>   
>   	filemap_invalidate_unlock(inode->i_mapping);
>   	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
> +	f2fs_update_time(sbi, REQ_TIME);
>   out:
>   	inode_unlock(inode);
>   
> @@ -3766,6 +3769,7 @@ static int f2fs_reserve_compress_blocks(struct file *filp, unsigned long arg)
>   		clear_inode_flag(inode, FI_COMPRESS_RELEASED);
>   		inode_set_ctime_current(inode);
>   		f2fs_mark_inode_dirty_sync(inode, true);
> +		f2fs_update_time(sbi, REQ_TIME);
>   	}
>   unlock_inode:
>   	inode_unlock(inode);
> @@ -3964,6 +3968,7 @@ static int f2fs_sec_trim_file(struct file *filp, unsigned long arg)
>   	if (len)
>   		ret = f2fs_secure_erase(prev_bdev, inode, prev_index,
>   				prev_block, len, range.flags);
> +	f2fs_update_time(sbi, REQ_TIME);
>   out:
>   	filemap_invalidate_unlock(mapping);
>   	f2fs_up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
> @@ -4173,6 +4178,7 @@ static int f2fs_ioc_decompress_file(struct file *filp)
>   	if (ret)
>   		f2fs_warn(sbi, "%s: The file might be partially decompressed (errno=%d). Please delete the file.",
>   			  __func__, ret);
> +	f2fs_update_time(sbi, REQ_TIME);
>   out:
>   	inode_unlock(inode);
>   	file_end_write(filp);
> @@ -4252,6 +4258,7 @@ static int f2fs_ioc_compress_file(struct file *filp)
>   	if (ret)
>   		f2fs_warn(sbi, "%s: The file might be partially compressed (errno=%d). Please delete the file.",
>   			  __func__, ret);
> +	f2fs_update_time(sbi, REQ_TIME);
>   out:
>   	inode_unlock(inode);
>   	file_end_write(filp);