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SubjectRe: Kernel hacking ? - Can this be done?
On Fri, Jul 30, 1999 at 10:40:46PM +0200, Arjan van de Ven wrote:

> > Does that mean you're doing a kernel space -> kernel space copy?
> Yes.

> > Couldn't you just nick the data straight from the page cache?

> That is possible too, in fact, I am adding this to kHTTPd right now. For
> non-performance critical tasks, this is WAY to much pain though, since this
> will only work for most filesystems (the f_ops->read works for ALL sane
> filesystems), and proper locking isn't easy either.

If instead of the current f_ops->read, filesystems exported a function which
could take something similar to a read_actor_t, you could use that. I think.
I need to think about this a bit more..

"Apathy is not the problem, it's the solution"

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