Re: [RFD] readonly/read-write semantics

[Xavier Bestel]

On mar, 2001-09-04 at 12:15, Alexander Viro wrote:
> 
> 
> On 4 Sep 2001, Xavier Bestel wrote:
> 
> > On mar, 2001-09-04 at 06:09, Alexander Viro wrote:
> > 
> > > Read-only is more complex - in addition to mount side ("does anyone want
> > > it to be r/w") there is a filesystem side ("does fs agree to be r/w")...
> > 
> > How about, say, a reiserfs mounted r/o on a shared partition (loopback
> > over nfs) ? If it contains errors, maybe 2 "clients" will attempt to
> > rollback at the same time. Is the solution to never mount, even r/o,
> > remote journalling fs ?
> 
> ??? Rollback is purely local thing, so NFS client doesn't matter at all.
> And nfsd is just an application running on server, whether it's a kernel
> thread or a normal process.

Sorry, I meant journal replaying ... AFAIK, this operation will write on
the media even if mounted r/o.

Xav