Please ignore this patch! Sorry for this!
Warm Regards,
Surbhi.
On Fri, 2010-03-26 at 18:50 +0200, Surbhi Palande wrote:
> To ensure that bits are truly on-disk after an fsync,
> we should call blkdev_issue_flush if barriers are supported.
>
> This code is seen in ext4 through commits
> d755fb384250d6bd7fd18a0930e71965acc8e72e and
> 5f3481e9a80c240f169b36ea886e2325b9aeb745.
>
> Signed-off-by: Surbhi Palande <surbhi.palande@xxxxxxxxxxxxx>
> ---
> fs/ext3/fsync.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/fs/ext3/fsync.c b/fs/ext3/fsync.c
> index d336341..2184a40 100644
> --- a/fs/ext3/fsync.c
> +++ b/fs/ext3/fsync.c
> @@ -29,6 +29,7 @@
> #include <linux/jbd.h>
> #include <linux/ext3_fs.h>
> #include <linux/ext3_jbd.h>
> +#include <linux/blkdev.h>
>
> /*
> * akpm: A new design for ext3_sync_file().
> @@ -46,6 +47,7 @@ int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
> {
> struct inode *inode = dentry->d_inode;
> int ret = 0;
> + journal_t *journal = EXT3_SB(inode->i_sb)->s_journal;
>
> J_ASSERT(ext3_journal_current_handle() == NULL);
>
> @@ -87,5 +89,7 @@ int ext3_sync_file(struct file * file, struct dentry *dentry, int datasync)
> ret = sync_inode(inode, &wbc);
> }
> out:
> + if (journal && (journal->j_flags & JFS_BARRIER))
> + blkdev_issue_flush(inode->i_sb->s_bdev, NULL);
> return ret;
> }
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