On Wed, Oct 07, 2020 at 04:20:13AM +0100, Matthew Wilcox wrote: > On Tue, Oct 06, 2020 at 09:05:49PM -0400, jglisse@xxxxxxxxxx wrote: > > The present patchset just add mapping argument to the various vfs call- > > backs. It does not make use of that new parameter to avoid regression. > > I am posting this whole things as small contain patchset as it is rather > > big and i would like to make progress step by step. > > Well, that's the problem. This patch set is gigantic and unreviewable. > And it has no benefits. The idea you present here was discussed at > LSFMM in Utah and I recall absolutely nobody being in favour of it. > You claim many wonderful features will be unlocked by this, but I think > they can all be achieved without doing any of this very disruptive work. You have any ideas on how to achieve them without such change ? I will be more than happy for a simpler solution but i fail to see how you can work around the need for a pointer inside struct page. Given struct page can not grow it means you need to be able to overload one of the existing field, at least i do not see any otherway. Cheers, Jérôme
