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Subject: Re: [PATCH 1/2] ocfs2: use jbd2_inode dirty range scoping
To:     Joseph Qi <joseph.qi@linux.alibaba.com>, akpm@linux-foundation.org
Cc:     Theodore Ts'o <tytso@mit.edu>, Ross Zwisler <zwisler@chromium.org>,
        linux-ext4@vger.kernel.org, ocfs2-devel@oss.oracle.com
References: <1562914972-97318-1-git-send-email-joseph.qi@linux.alibaba.com>
From:   Changwei Ge <chge@linux.alibaba.com>
Message-ID: <30d43b0b-2cb6-916d-d514-268493a6691e@linux.alibaba.com>
Date:   Fri, 12 Jul 2019 17:45:21 +0800
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Hi Joseph,


Originally, ocfs2_jbd2_file_inode() is a wrapper of jbd2 routine 
jbd2_journal_file_inode() which has been renamed

by Jan Kara long ago. (41617e1a8dec9fe082ba5dec26bacb154eb55482)


So how about we change ocfs2_jbd2_file_inode to 
ocfs2_jbd2_inode_add_write() this time within your patch?


Thanks,

Changwei


On 2019/7/12 3:02 下午, Joseph Qi wrote:
> commit 6ba0e7dc64a5 ("jbd2: introduce jbd2_inode dirty range scoping")
> allow us scoping each of the inode dirty ranges associated with a given
> transaction, and ext4 already does this way.
> Now let's also use the newly introduced jbd2_inode dirty range scoping
> to prevent us from waiting forever when trying to complete a journal
> transaction in ocfs2.
>
> Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> ---
>   fs/ocfs2/alloc.c   |  4 +++-
>   fs/ocfs2/aops.c    |  6 ++++--
>   fs/ocfs2/file.c    | 10 +++++++---
>   fs/ocfs2/journal.h |  6 ++++--
>   4 files changed, 18 insertions(+), 8 deletions(-)
>
> diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
> index d1348fc..2a58ca4 100644
> --- a/fs/ocfs2/alloc.c
> +++ b/fs/ocfs2/alloc.c
> @@ -6792,6 +6792,8 @@ void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
>   			      struct page *page, int zero, u64 *phys)
>   {
>   	int ret, partial = 0;
> +	loff_t start_byte = ((loff_t)page->index << PAGE_SHIFT) + from;
> +	loff_t length = to - from;
>   
>   	ret = ocfs2_map_page_blocks(page, phys, inode, from, to, 0);
>   	if (ret)
> @@ -6811,7 +6813,7 @@ void ocfs2_map_and_dirty_page(struct inode *inode, handle_t *handle,
>   	if (ret < 0)
>   		mlog_errno(ret);
>   	else if (ocfs2_should_order_data(inode)) {
> -		ret = ocfs2_jbd2_file_inode(handle, inode);
> +		ret = ocfs2_jbd2_file_inode(handle, inode, start_byte, length);
>   		if (ret < 0)
>   			mlog_errno(ret);
>   	}
> diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
> index a4c905d..bbb508a 100644
> --- a/fs/ocfs2/aops.c
> +++ b/fs/ocfs2/aops.c
> @@ -942,7 +942,7 @@ static void ocfs2_write_failure(struct inode *inode,
>   
>   		if (tmppage && page_has_buffers(tmppage)) {
>   			if (ocfs2_should_order_data(inode))
> -				ocfs2_jbd2_file_inode(wc->w_handle, inode);
> +				ocfs2_jbd2_file_inode(wc->w_handle, inode, user_pos, user_len);
>   
>   			block_commit_write(tmppage, from, to);
>   		}
> @@ -2024,7 +2024,9 @@ int ocfs2_write_end_nolock(struct address_space *mapping,
>   
>   		if (page_has_buffers(tmppage)) {
>   			if (handle && ocfs2_should_order_data(inode))
> -				ocfs2_jbd2_file_inode(handle, inode);
> +				ocfs2_jbd2_file_inode(handle, inode,
> +						      ((loff_t)tmppage->index << PAGE_SHIFT) + from,
> +						      to - from);
>   			block_commit_write(tmppage, from, to);
>   		}
>   	}
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index 4435df3..43e6c28 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -706,7 +706,9 @@ static int ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
>    * Thus, we need to explicitly order the zeroed pages.
>    */
>   static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
> -						struct buffer_head *di_bh)
> +						      struct buffer_head *di_bh,
> +						      loff_t start_bytes,
> +						      loff_t length)
>   {
>   	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
>   	handle_t *handle = NULL;
> @@ -722,7 +724,7 @@ static handle_t *ocfs2_zero_start_ordered_transaction(struct inode *inode,
>   		goto out;
>   	}
>   
> -	ret = ocfs2_jbd2_file_inode(handle, inode);
> +	ret = ocfs2_jbd2_file_inode(handle, inode, start_bytes, length);
>   	if (ret < 0) {
>   		mlog_errno(ret);
>   		goto out;
> @@ -761,7 +763,9 @@ static int ocfs2_write_zero_page(struct inode *inode, u64 abs_from,
>   	BUG_ON(abs_to > (((u64)index + 1) << PAGE_SHIFT));
>   	BUG_ON(abs_from & (inode->i_blkbits - 1));
>   
> -	handle = ocfs2_zero_start_ordered_transaction(inode, di_bh);
> +	handle = ocfs2_zero_start_ordered_transaction(inode, di_bh,
> +						      abs_from,
> +						      abs_to - abs_from);
>   	if (IS_ERR(handle)) {
>   		ret = PTR_ERR(handle);
>   		goto out;
> diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
> index c0fe6ed..932e6a8 100644
> --- a/fs/ocfs2/journal.h
> +++ b/fs/ocfs2/journal.h
> @@ -603,9 +603,11 @@ static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
>   	return credits;
>   }
>   
> -static inline int ocfs2_jbd2_file_inode(handle_t *handle, struct inode *inode)
> +static inline int ocfs2_jbd2_file_inode(handle_t *handle, struct inode *inode,
> +					loff_t start_byte, loff_t length)
>   {
> -	return jbd2_journal_inode_add_write(handle, &OCFS2_I(inode)->ip_jinode);
> +	return jbd2_journal_inode_ranged_write(handle, &OCFS2_I(inode)->ip_jinode,
> +					       start_byte, length);
>   }
>   
>   static inline int ocfs2_begin_ordered_truncate(struct inode *inode,