Commit ea1aa12c authored Jul 24, 2014 by Jaegeuk Kim

f2fs: enable in-place-update for fdatasync



This patch enforces in-place-updates only when fdatasync is requested.
If we adopt this in-place-updates for the fdatasync, we can skip to write the
recovery information.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent 6d99ba41

fs/f2fs/f2fs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -998,6 +998,7 @@ enum {
		FI_INLINE_DATA, /* used for inline data*/
		FI_APPEND_WRITE, /* inode has appended data */
		FI_UPDATE_WRITE, /* inode has in-place-update data */
		FI_NEED_IPU, /* used fo ipu for fdatasync */
		};

		static inline void set_inode_flag(struct f2fs_inode_info *fi, int flag)

fs/f2fs/file.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -127,7 +127,14 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
		return 0;

		trace_f2fs_sync_file_enter(inode);

		/* if fdatasync is triggered, let's do in-place-update */
		if (datasync)
		set_inode_flag(fi, FI_NEED_IPU);

		ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
		if (datasync)
		clear_inode_flag(fi, FI_NEED_IPU);
		if (ret) {
		trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
		return ret;

fs/f2fs/segment.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -486,6 +486,10 @@ static inline bool need_inplace_update(struct inode *inode)
		if (S_ISDIR(inode->i_mode))
		return false;

		/* this is only set during fdatasync */
		if (is_inode_flag_set(F2FS_I(inode), FI_NEED_IPU))
		return true;

		switch (SM_I(sbi)->ipu_policy) {
		case F2FS_IPU_FORCE:
		return true;