On Wed, 8 Sep 1999, Luoqi Chen wrote:

> > The flag MNT_RELOAD is not documented in mount manpages.  From the source
> > code, I find that it is always used along with MNT_UPDATE which can be
> > speficied by user (-u option).  Can anyone explain the usage of MNT_RELOAD
> > for me?  It seems not to be used normally.
> > 
> It is created almost exclusively for fsck (and similar programs) to update
> the in core image of the superblock (of / in single user mode) after the
> on disk version has been modified.
> 

Does fsck have to run on a MOUNTED filesystem?  If so, your answer makes
sense to me: if fsck modifies the on-disk copy of the superblock, it does
not have to unmount and then remount the filesystem, it only need to
reload the superlock for disk. 

-Zhihui 



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