On Tue, Jun 27 2006, Paolo Ornati wrote:
> On Sun, 25 Jun 2006 19:43:59 +0200
> Jens Axboe <[email protected]> wrote:
>
> > > > Hmm, and you are sure that the fs is properly umounted on reboot? Or is
> > > > it just remounted ro? It looks like fcache_close_dev() isn't being
> > > > called, so the cache serial doesn't match what we expect from the fs,
> > > > hence fcache bails out since it could indicate that the fs has been
> > > > changed without fcache being attached.
> > >
> > > Ahh... it is the root fs and it's just remounted read-only by the
> > > standard Gentoo scripts ;)
> > >
> > > I don't think that unmounting it is trivial (you need to chroot to a
> > > virtual FS or something...). Does any distro do it?
> >
> > ro should be enough, something odd must be going on. I'll add it to the
> > list of things to test tomorrow.
>
> Since "fcache_close_dev()" is called by "ext3_put_super()" I have added
> this stupid printk:
>
> --- fs/ext3/super.c.orig 2006-06-27 10:47:15.000000000 +0200
> +++ fs/ext3/super.c 2006-06-27 10:50:36.000000000 +0200
> @@ -422,6 +422,8 @@ static void ext3_put_super (struct super
>
> has_fcache = test_opt(sb, FCACHE);
>
> + printk("!!! ext3_put_super !!! has_fcache=%d\n", has_fcache);
> +
> ext3_xattr_put_super(sb);
> journal_destroy(sbi->s_journal);
> if (!(sb->s_flags & MS_RDONLY)) {
>
>
> It triggers on unmount but it doesn't on remount "ro".
>
> So the problem is that "fcache_close_dev()" have zero chances to run ;)
Hmm, you seem to be using an older fcache version. I'll test this and
post an updated patch if it doesn't work with the newer version.
--
Jens Axboe
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