Re: [PATCH 15/24] x86/mm: Allow flushing for future ASID switches

Peter Zijlstra
2017-11-30T20:01:51Z

On Thu, Nov 30, 2017 at 10:48:56AM -0800, Andy Lutomirski wrote:
> Should it be tlb_flush_shared_nonglobals_if_kernel_and_user_pagetables_are_separate()?

Its effectively invpcid_flush_all_other() or something like that. Of
course, its not invpcid based, so we should not name it such.

flush_asid_other() ?

> The whole idea that we can get away with ambiguous functions like
> __flush_tlb() seems to be much less true with KAISER. I think we
> should maybe start getting rid of overly vague functions like this.

There is a lot of cleanup to be done for sure. I had to actually draw
pictures to untangle this stuff.