[dm-devel] Latest dm-userspace kernel code

[FUJITA Tomonori]

From: Dan Smith <danms at us.ibm.com>
Subject: Re: [dm-devel] Latest dm-userspace kernel code
Date: Sat, 30 Sep 2006 08:48:53 -0700

> FT> If you add a feature to notify I/O completion of user space (I
> FT> think this feature is necessary for other reasons too), user-space
> FT> programs can take care about this easily. I prefer the
> FT> dm-userspace kernel module to just perform I/Os according to
> FT> requests from user space.
> 
> I have thought about this approach before, and perhaps it makes sense,
> as it will simplify the kernel module and move all of the CoW-like
> behavior back out to userspace.

I think that it would be better for the kerne module to provide only
generic mechanisms.


> In order for this to perform well, we will need to use AIO, right?

I'm not sure about this. Can you elaborate?