Re: xfs_ncheck gives outdated and partial result

[Eric Sandeen <sandeen@sandeen.net>]

Daniele P. wrote:
> Hi All,
> I'm here to ask a couple of question regarding xfs_ncheck.
> I'm using xfs_db version 2.6.20
> 
> The first question is:
> Is it right that I have to unmount/mount the filesystem before
> using it (1), or to get the partial right (3) answer?
> And why it's print only the first file name for inodes pointed
> by multiple files (2)?

I think Lachlan had good answers to your questions... I'm curious, are
you using xfs_ncheck on a mounted filesystem for any particular reason?
 It seems that maybe if you are concerned about the out-of-date info on
a mounted filesystem, maybe you are attempting to use this from a script
or something as part of a larger tool, and that may not be a good idea
in general.  xfs_ncheck, a wrapper around xfs_db, reads the block device
directly, and nothing in the kernel guarantees consistency between the
block device address space and the filesystem address space.

-Eric