Re: [PATCH] [Request for inclusion] Filesystem in Userspace

[Avi Kivity]

Alan Cox wrote:

> > I really do believe that user-space filesystems have problems. There's a 
> > reason we tend to do them in kernel space. 
> >
> > But limiting the outstanding writes some way may at least hide the thing.
> >    
>
> Possibly dumb question. Is there a reason we can't have a prctl() that
> flips the PF_* flags for a user space daemon in the same way as we do
> for kernel threads that do I/O processing ?
>
>  
http://lkml.org/lkml/2004/7/26/68

discusses a userspace filesystem (implemented as a userspace nfs server 
mounted on a loopback nfs mount), the problem, a solution (exactly your 
suggestion), and a more generic solution.

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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