[PATCH 1/2] jffs2: Move erasing from write_super to GC.

[Artem Bityutskiy]

On Thu, 2010-02-18 at 13:17 +0100, Joakim Tjernlund wrote:
> Artem Bityutskiy <dedekind1 at gmail.com> wrote on 2010/02/18 12:06:06:
> >
> > On Wed, 2010-02-17 at 09:16 +0100, Joakim Tjernlund wrote:
> > > diff --git a/fs/jffs2/erase.c b/fs/jffs2/erase.c
> > > index b47679b..1ca2559 100644
> > > --- a/fs/jffs2/erase.c
> > > +++ b/fs/jffs2/erase.c
> > > @@ -114,6 +114,11 @@ void jffs2_erase_pending_blocks(struct jffs2_sb_info
> > *c, int count)
> > >     while (!list_empty(&c->erase_complete_list) ||
> > >            !list_empty(&c->erase_pending_list)) {
> > >
> > > +      if (signal_pending(current)) {
> > > +         spin_unlock(&c->erase_completion_lock);
> > > +         mutex_unlock(&c->erase_free_sem);
> > > +         goto done;
> > > +      }
> >
> > Err, I thought you would remove signal checking from this function? It
> > really does not belong here.
> 
> Slight misunderstanding, it needs to be there otherwise my patches won't do any good.
> Removing signal from this function basically means that we should remove count
> and only erase one block per invocation. Basically the while !empty loop needs to move
> into the GC task instead. This is a somewhat bigger surgery but doable.

Right. You can move the signal check to the BGT, and do 1-3 erases at a
time by passing cnt = 1-3. I think it is cleaner.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)