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    Subject[PATCH AUTOSEL 4.9 026/107] f2fs: move dir data flush to write checkpoint process
    Date
    From: Yunlei He <heyunlei@huawei.com>

    [ Upstream commit b61ac5b720146c619c7cdf17eff2551b934399e5 ]

    This patch move dir data flush to write checkpoint process, by
    doing this, it may reduce some time for dir fsync.

    pre:
    -f2fs_do_sync_file enter
    -file_write_and_wait_range <- flush & wait
    -write_checkpoint
    -do_checkpoint <- wait all
    -f2fs_do_sync_file exit

    now:
    -f2fs_do_sync_file enter
    -write_checkpoint
    -block_operations <- flush dir & no wait
    -do_checkpoint <- wait all
    -f2fs_do_sync_file exit

    Signed-off-by: Yunlei He <heyunlei@huawei.com>
    Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    fs/f2fs/file.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
    index b768f495603e..f46ac1651bd5 100644
    --- a/fs/f2fs/file.c
    +++ b/fs/f2fs/file.c
    @@ -198,6 +198,9 @@ static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,

    trace_f2fs_sync_file_enter(inode);

    + if (S_ISDIR(inode->i_mode))
    + goto go_write;
    +
    /* if fdatasync is triggered, let's do in-place-update */
    if (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
    set_inode_flag(inode, FI_NEED_IPU);
    --
    2.19.1
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