RE: [PATCH v4 0/4] Sending kernel pathrecord query to user cache server

Weiny, Ira
2015-06-10T21:31:10Z

>
> > > > This series does not attempt to optimize the kernel needing to
> > > > know that a PR has been updated. There are existing mechanisms for
> that.
> > >
> > > Does this exist in the kernel?
> >
> > At least some support, yes. For example client reregister marks all
> > IPoIB paths as invalid.
>
> Reregister indicates that all PRs are now invalid?

Not directly. IPoIB treats it that way. I guess to "be safe".

Officially one should register for UnPath/RePath traps. But no one has ever implemented that.

To be clear I am agreeing with Hal that having some sort of "update signal" would be nice. But I don't think that must be done before this series goes in.

I think a PR "update signal" should be an extension to this interface.

Ira