On Mon, 12 Sep 2016 00:51:28 -0700
Christoph Hellwig <hch(a)infradead.org> wrote:
On Mon, Sep 12, 2016 at 05:25:15PM +1000, Oliver O'Halloran
> What are the problems here? Is this a matter of existing filesystems
> being unable/unwilling to support this or is it just fundamentally
It's a fundamentally broken model. See Dave's post that actually was
sent slightly earlier then mine for the list of required items, which
is fairly unrealistic. You could probably try to architect a file
system for it, but I doubt it would gain much traction.
It's not fundamentally broken, it just doesn't fit well existing
Dave's post of requirements is also wrong. A filesystem does not have
to guarantee all that, it only has to guarantee that is the case for
a given block after it has a mapping and page fault returns, other
operations can be supported by invalidating mappings, etc.