Re: [PATCH 2/3] nilfs2: nilfs_segctor_destroy() should do a full job

[Li Hong <lihong.hi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Sun, Apr 11, 2010 at 03:10:05AM +0900, Ryusuke Konishi wrote:
> On Sun, 11 Apr 2010 00:17:00 +0800, Li Hong <lihong.hi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > From 466fbbc10dabc8a14e292ee19636fc534036a8b7 Mon Sep 17 00:00:00 2001
> > From: Li Hong <lihong.hi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > Date: Sat, 10 Apr 2010 22:26:04 +0800
> > Subject: [PATCH 2/3] nilfs2: nilfs_segctor_destroy() should do a full job
> > 
> > To set "sbi->s_sc_info = NULL;" is also a part of nilfs_segctor_destroy()'s job.
> > Move it into the destroy procedure.
> > 
> > Signed-off-by: Li Hong <lihong.hi-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> 
> No, don't do this.  sbi->s_sc_info is the holder of the segment
> constructor object and is not a part of the object though
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
No, my meaning is that: to set "sbi->s_sc_info = NULL;" is also a _part_ of 
nilfs_segctor_destroy()'s _job_. I should make the explanation clearer. IMO, I
just think 'kfree something' and 'set the obj to NULL' can't be seperated by a
procedure.

Thanks,
Li Hong

> nilfs_segctor_destroy needs some cleanup.
> 
> Ryusuke Konishi
> 
> > ---
> >  fs/nilfs2/segment.c |    5 ++---
> >  1 files changed, 2 insertions(+), 3 deletions(-)
> > 
> > diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
> > index 514620d..dd3c4d5 100644
> > --- a/fs/nilfs2/segment.c
> > +++ b/fs/nilfs2/segment.c
> > @@ -2774,6 +2774,7 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
> >  	down_write(&sbi->s_nilfs->ns_segctor_sem);
> >  
> >  	kfree(sci);
> > +	sbi->s_sc_info = NULL;
> >  }
> >  
> >  /**
> > @@ -2829,10 +2830,8 @@ void nilfs_detach_segment_constructor(struct nilfs_sb_info *sbi)
> >  	LIST_HEAD(garbage_list);
> >  
> >  	down_write(&nilfs->ns_segctor_sem);
> > -	if (NILFS_SC(sbi)) {
> > +	if (NILFS_SC(sbi))
> >  		nilfs_segctor_destroy(NILFS_SC(sbi));
> > -		sbi->s_sc_info = NULL;
> > -	}
> >  
> >  	/* Force to free the list of dirty files */
> >  	spin_lock(&sbi->s_inode_lock);
> > -- 
> > 1.6.3.3
> > 
> > --
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