Hi Slava, David,
I've sent a patch to fix the bug(Cced you), could you please check if it
works? :)
thanks,
liubo
On Thu, Dec 27, 2012 at 02:24:37PM +0100, David Sterba wrote:
> On Thu, Dec 27, 2012 at 04:07:31PM +0800, Liu Bo wrote:
> > On Thu, Dec 27, 2012 at 08:27:11AM +0400, Slava Barinov wrote:
> > > And there's nothing in dmesg that could help user to understand what
> > > happened. I've lost about ten minutes trying to understand what does
> > > it want from me.
> >Could you please show me what line does 'walk_down_proc+0x2b0/0x2e0 [btrfs]'
> > refer to?
>
> It's
>
> 6578 if (path->locks[level] && level > 0) {
> 6579 btrfs_tree_unlock_rw(eb, path->locks[level]);
> ^^^^
> 6580 path->locks[level] = 0;
> 6581 }
> 6582 return 0;
>
> which calls btrfs_tree_unlock() and hits the
>
> 241 void btrfs_tree_unlock(struct extent_buffer *eb)
> 242 {
> 243 int blockers = atomic_read(&eb->blocking_writers);
> 244
> 245 BUG_ON(blockers > 1);
> 246
> 247 btrfs_assert_tree_locked(eb);
>
> ->
>
> 263 void btrfs_assert_tree_locked(struct extent_buffer *eb)
> 264 {
> 265 BUG_ON(!atomic_read(&eb->write_locks));
> 266 }
>
>
> david
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