Re: [fuse-devel] FUSE filesystem hangs during unlink

[Franco <fr...@fu...>]

I've attached a kernel traceback showing the fuse filesystem (squirrel)
during the unlink, there's also a process doing an ls of the mountpoint
and a df which were hanging.

On Tue, 2010-03-02 at 10:25 +0800, Franco wrote:
> Hi
> 
> We've noticed that during unlink operations our FUSE filesystem hangs
> until the unlink is complete. Further investigation appears to show that
> it's not confined to just unlink, other operations are seeming blocking
> until they complete - almost as if the filesystem is running single
> threaded.
> 
> See below for a traceback of the thread doing the unlink.
> 
> fusermount version: 2.7.4
> kernel versions from 2.6.24 to 2.6.33
> 
> Cheers,
> Franco
> 
> 
> -------- Forwarded Message --------
> From: Grahame Bowland <gr...@fu...>
> To: Franco Broi <fr...@fu...>
> Subject: Hmm.
> Date: Tue, 02 Mar 2010 10:07:57 +0800
> 
> (gdb) info thread
> [New Thread 0x41e16950 (LWP 7187)]
>    4 Thread 0x41e16950 (LWP 7187)  0x0000003150a0d70e in 
> __lll_lock_wait_private
>      () from /lib64/libpthread.so.0
>    3 Thread 0x409c7950 (LWP 4099)  0x0000003150a05781 in 
> __nptl_create_event ()
>     from /lib64/libpthread.so.0
>    2 Thread 0x41615950 (LWP 4100)  0x000000314fed7d07 in unlink ()
>     from /lib64/libc.so.6
> * 1 Thread 0x7f11d384c6f0 (LWP 4051)  0x0000003150a0cf31 in sem_wait ()
>     from /lib64/libpthread.so.0
> 
> 
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