Re: Strane remount behaviour with ext3-2.4-0.9.4

["Stephen C. Tweedie" <sct@redhat.com>]

Hi,

On Fri, Jul 27, 2001 at 11:15:39AM -0600, Andreas Dilger wrote:

> > servers.  Since the server in question is a farily security-sensitive box, my
> > /usr partition is mounted read only except when I remount rw to install
> > packages.
> 
> If it is a security-sensitive box, you need to at least use data=ordered or
> data=journal.  Using data=writeback allows the possibility that after a crash
> one user might be able to read data from deleted files of another user (note
> that reiserfs currently only runs the equivalent of data=writeback).

Agreed, and for most workloads data=ordered will have very little
performance difference from data=writeback.

> You _could_ leave out the data=writeback from /etc/fstab (default is ordered),
> and you will be able to remount OK.  Also, Andrew made a patch which allowed
> you to specify the data= mode on remount, as long it is the same. 

Indeed, but I'll need to make sure that the remount with no data= mode
also works (that should be legal.)

Cheers,
 Stephen