Re: how to flush an XFS filesystem

[Nathan Scott <nathans@xxxxxxx>]

On Wed, Jul 13, 2005 at 04:40:34PM +0300, martin f krafft wrote:
> > [root@bruce fsgqa]# mount -o rw,rtdev=/dev/sdc1,logdev=/dev/sda11,uquota 
> > /dev/sdb5 /mnt/xfs0
> 
> [...]
> 
> > [root@bruce fsgqa]# xfs_db -x /dev/sdb5
> 
> Both of these are different from the way grub accesses it. In order
> for me to reproduce the problem, I had to get access to the
> partition before mounting it.

The second case (xfs_db, above) is doing exactly that.

> It seems as if (a) the file gets
> written to extents on the disk, and (b) that the inode is written to
> the log, but the log is never flushed such that the metadata never
> make it to the filesystem.

It doesn't seem like that to me.

> Mounting the filesystem on next reboot causes the log to be replayed
> and consistency to be restored. I assume xfs_db does the same.

No, it doesn't.  Log replay only happens during mount.

> Grub, on the other hand, tries to get the file, but it does not
> exist in the directory (and grub cannot replay the log), so it fails
> to find it.

xfs_db would have the same problem, but doesn't...

cheers.

-- 
Nathan