[NILFS users] nilfs_cpfile_delete_checkpoints: cannot delete block

[Ryusuke Konishi]

Hi,
On Wed, 06 May 2009 12:02:04 +0900 (JST), Ryusuke Konishi wrote:
> Hi,
> On Tue, 05 May 2009 21:32:27 +0200, David Arendt wrote:
> > Hi,
> > 
> > after cleaner was running for 2 hours and freeing up 200gbytes of space 
> > I had the following crash:
> > 
> > nilfs_cpfile_delete_checkpoints: cannot delete block: cno=76377, range = 
> > [75980, 76972)
> > NILFS: GC failed during preparation: cannot delete checkpoints: err=-2
> > NILFS_PAGE_BUG(c10d67e0): cnt=2 index#=74049180 flags=0x40000835 
> > mapping=f71d10d4 ino=0
> >  BH[0] d3cbdb30: cnt=2 block#=74049180 state=0x2002b
> > ------------[ cut here ]------------
> > kernel BUG at /home/admin/x/nilfs-2.0.12/fs/btnode.c:233!
> 
> The log shows a btree routine, nilfs_btree_propagate() has detected an
> orphan btree node in the page cache.  Looks another inconsistency.
> 
> I'd like to know if this is a regression of the previous patch or not
> ( I guess it's not ). If you see this for new volumes, please let me
> know.
> 
> I'll digging into the btree code to hunt this later.
> 
> Thanks,
> Ryusuke Konishi

I haven't yet identified if this is a regression or not.

The previous patch has included several changes.  So, I will send a
moderate patch for upstream.

Regards,
Ryusuke Konishi