SUJ Changes

[Mario Lobo]

On Wednesday 26 May 2010 23:56:24 Garrett Cooper wrote:
> On Wed, May 26, 2010 at 3:52 PM, Marcelo/Porks <marcelorossi at gmail.com> 
wrote:
> > On 5/25/10, Marcelo/Porks <marcelorossi at gmail.com> wrote:
> >> Hi! I tested the r208241 and it's seems to be ok but this calls my
> >> atention to other thing: Could I disable de SU when the SUJ is
> >> enabled?
> >>
> >> I did some tests and seems that I can do this (logs bellow).
> >>
> >> But will SUJ work properly with SU disabled?
> >
> > Hi guys. I'm not sure if I could call this a problem but I can disable
> > SU when SUJ is enabled, so SUJ will remain enabled and SU will be
> > disabled.
> >
> > #tunefs -j enable /dev/device
> > #tunefs -n disable /dev/device
> >
> > I did a patch for sbin/tunefs/tunefs.c that disable SUJ when the user
> > disable SU. Maybe this will be useful for some of you.
> >
> > Thanks.
> >
> >
> > Index: sbin/tunefs/tunefs.c
> > ===================================================================
> > --- sbin/tunefs/tunefs.c        (revision 208580)
> > +++ sbin/tunefs/tunefs.c        (working copy)
> > @@ -460,6 +460,14 @@
> >                        if ((~sblock.fs_flags & FS_DOSOFTDEP) ==
> > FS_DOSOFTDEP) warnx("%s remains unchanged as disabled", name); else {
> > +                               /* also disable SUJ */
> > +                               if ((sblock.fs_flags & FS_SUJ) == FS_SUJ)
> > { +                                       warnx("soft updates journaling
> > will be disabled too");
> > +                                       journal_clear();
> > +                                       sblock.fs_flags &= ~FS_SUJ;
> > +                                       sblock.fs_sujfree = 0;
> > +                                       warnx("remove .sujournal to
> > reclaim space");
> > +                               }
> >                                sblock.fs_flags &= ~FS_DOSOFTDEP;
> >                                warnx("%s cleared", name);
> >                        }
> 
> I think that it makes sense to have this as a force option as someone
> may want to retain their journal instead of disposing of it
> automatically.
> 
> I think that the 2nd warnx should be the first warnx, and the 2nd
> warnx can be removed as it'll be quickly followed up by <blah>
> cleared. Changing `remove' to `removing' and changing `.sujournal' to
> journal would a) make the action more correct and b) make the concept
> more straightforward as to what's being removed, as Jeff or someone
> else may decide to remove or rename .sujournal in the future, and it's
> just another thing that users don't have to understand that aren't
> familiar with FreeBSD or SUJ.
> 
> Thanks,
> -Garrett
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> 
Is this available in 8-STABLE? Can it be?
Can this be activated on my current installation without loosing data?

Thanks,
-- 
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since 2.2.8 [not Pro-Audio.... YET!!] (99% winfoes FREE)