Re: [fuse-devel] fuse forget

[Miklos S. <mi...@sz...>]

On Wed, 10 Dec 2008, Brian Wang wrote:
> Thanks for the reply.
> 
> Then if "hard_remove" is not used, any node forgotten should be removed from 
> the node cache and from the fuse kernel? But there are cases nodes are 
> forgotten with name and parent set to NULL, but they are still in the node 
> table.

Hmm, thinking about it a bit more, it could happen without
"hard_remove" as well.  For example if a file and a parent directory
are removed in close succession, and processing the FORGET requests
happens in reverse order.

> I am trying to make my fuse fs work better with NFS, it works pretty well in 
> general, but I do have one problem under stress test for a long time period. 
> I am trying to find out why.
> 
> What happens is that fuse kernel module would return EBUSY from the 
> following function after a long period of running. I wonder why happens in 
> the user land fuse would cause this. My guess is that the node refctr might 
> be wrong, but have not be find out what's wrong with my code. I do reuse the 
> nodeid because I have to have persistent nodeid after reboot. When EBUSY is 
> returned from the following function, does it mean that a nodeid is reused 
> for a dir but that dir still have something else refer to it?

Exactly.

Miklos