On Fri, Sep 07, 2018 at 02:36:08AM -0400, Jon Masters wrote: > On 09/05/2018 08:28 AM, Will Deacon wrote: > > On Tue, Sep 04, 2018 at 02:38:02PM -0400, Jon Masters wrote: > >> On 08/24/2018 11:52 AM, Will Deacon wrote: > >> > >>> I hacked up this RFC on the back of the recent changes to the mmu_gather > >>> stuff in mainline. It's had a bit of testing and it looks pretty good so > >>> far. > >> > >> I will request the server folks go and test this. You'll probably > >> remember a couple of parts we've seen where aggressive walker caches > >> ended up (correctly) seeing stale page table entries and we had all > >> manner of horrifically hard to debug problems. We have some fairly nice > >> reproducers that were able to find this last time that we can test. > > > > Cheers, Jon, that would be very helpful. You're probably best off using > > my (rebasing) tlb branch rather than picking the RFC: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git tlb > > > > Let me know if you'd prefer something stable (I can tag it with a date). > > That would be useful. I've prodded each of the Arm server SoC vendors I > work with via our weekly call to have them each specifically check this. > A tag would be helpful to that effort I expect. They all claim to be > watching this thread now, so we'll see if they see cabbages here.
This is now all queued up in the (stable) arm64 for-next/core branch: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/core so that's the best place to grab the patches. Will
