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SubjectRe: [PATCH] [Request for inclusion] Filesystem in Userspace
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 ?

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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