On Tue, Aug 28, 2018 at 6:46 PM, Nadav Amit <nadav.a...@gmail.com> wrote: > Hello Andy, > > Is there a reason for __flush_tlb_one_kernel() to flush the PTE not only in > the kernel address space, but also in the user one (as part of > __flush_tlb_one_user)? [ I obviously regard the case when PTI is on ].
In most cases, probably not, but it's fairly cheap, I think. And it makes it so that we're okay if the TLB entry we're flushing is used by the entry code.