Re: [PATCH] [Request for inclusion] Filesystem in Userspace
From: Avi Kivity
Date: Wed Nov 24 2004 - 09:24:24 EST
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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