Messages in this thread | | | From | Jon Masters <> | Subject | Re: [RFC PATCH 00/11] Avoid synchronous TLB invalidation for intermediate page-table entries on arm64 | Date | Thu, 13 Sep 2018 12:53:30 -0400 (EDT) |
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Tnx
-- Computer Architect
> On Sep 13, 2018, at 11:52, Will Deacon <will.deacon@arm.com> wrote: > >> 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
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