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Groups > linux.kernel > #1720049
| From | Adam Borowski <kilobyte@angband.pl> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: kvm splat in mmu_spte_clear_track_bits |
| Date | 2017-08-25 15:20 +0200 |
| Message-ID | <uimGK-4wF-27@gated-at.bofh.it> (permalink) |
| References | (2 earlier) <uh0oW-8mG-21@gated-at.bofh.it> <uh11E-bc-19@gated-at.bofh.it> <uh3wt-1Pe-9@gated-at.bofh.it> <uhCXg-u4-3@gated-at.bofh.it> <uhV3P-3x1-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Aug 24, 2017 at 03:43:55PM +0800, Wanpeng Li wrote:
> 2017-08-23 20:22 GMT+08:00 Paolo Bonzini <pbonzini@redhat.com>:
> > On 22/08/2017 00:32, Adam Borowski wrote:
> >> On Mon, Aug 21, 2017 at 09:58:34PM +0200, Radim Krčmář wrote:
> >>> 2017-08-21 21:12+0200, Adam Borowski:
> >>>> Also, it doesn't reproduce for me on 4.12.
> >>>
> >>> Great info ... the most suspicious between v4.12 and v4.13-rc5 is the
> >>> series with dcdca5fed5f6 ("x86: kvm: mmu: make spte mmio mask more
> >>> explicit"), does reverting it help?
> >>>
> >>> `git revert ce00053b1cfca312c22e2a6465451f1862561eab~1..995f00a619584e65e53eff372d9b73b121a7bad5`
> >>
> >> Alas, doesn't seem to help.
> >>
> >> I've first installed a Debian stretch guest, the host survived both the
> >> installation and subsequent fooling around. But then I started a win10
> >> guest which splatted as soon as the initial screen.
> >
> > Can you check if disabling THP on the host also fixes it for you?
As in: ?
echo never >/sys/kernel/mm/transparent_hugepage/enabled
echo never >/sys/kernel/mm/transparent_hugepage/defrag
Still reproduces, with or without reverting
ce00053b1cfca312c22e2a6465451f1862561eab~1..995f00a619584e65e53eff372d9b73b121a7bad5
> > I would also try commit 1372324b328cd5dabaef5e345e37ad48c63df2a9 to
> > identify whether it was caused by a KVM change in 4.13 or something
> > else.
I've ran different guests for a couple of hours, no explosions. Thus it
looks like updating Cornelia's email address isn't the cause.
Too bad, there's 15k commits between 1372324b and 7f680d7ec315.
> For the OOM testcase, the splat will disappear if disabling THP.
Meow!
--
⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢰⠒⠀⣿⡁ Vat kind uf sufficiently advanced technology iz dis!?
⢿⡄⠘⠷⠚⠋⠀ -- Genghis Ht'rok'din
⠈⠳⣄⠀⠀⠀⠀
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-21 01:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Wanpeng Li <kernellwp@gmail.com> - 2017-08-21 03:30 +0200
Re: kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-21 21:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Radim Krčmář <rkrcmar@redhat.com> - 2017-08-21 22:00 +0200
Re: kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-22 00:40 +0200
Re: kvm splat in mmu_spte_clear_track_bits Paolo Bonzini <pbonzini@redhat.com> - 2017-08-23 14:30 +0200
Re: kvm splat in mmu_spte_clear_track_bits Wanpeng Li <kernellwp@gmail.com> - 2017-08-24 09:50 +0200
Re: kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-25 15:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Paolo Bonzini <pbonzini@redhat.com> - 2017-08-25 15:50 +0200
Re: kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-27 14:40 +0200
Re: kvm splat in mmu_spte_clear_track_bits Bernhard Held <berny156@gmx.de> - 2017-08-28 17:30 +0200
Re: kvm splat in mmu_spte_clear_track_bits Bernhard Held <berny156@gmx.de> - 2017-08-28 18:10 +0200
Re: kvm splat in mmu_spte_clear_track_bits Takashi Iwai <tiwai@suse.de> - 2017-08-28 18:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Takashi Iwai <tiwai@suse.de> - 2017-08-28 18:10 +0200
Re: kvm splat in mmu_spte_clear_track_bits Nadav Amit <nadav.amit@gmail.com> - 2017-08-28 19:00 +0200
Re: kvm splat in mmu_spte_clear_track_bits Bernhard Held <berny156@gmx.de> - 2017-08-29 11:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Adam Borowski <kilobyte@angband.pl> - 2017-08-29 15:10 +0200
Re: kvm splat in mmu_spte_clear_track_bits Andrea Arcangeli <aarcange@redhat.com> - 2017-08-29 16:10 +0200
Re: kvm splat in mmu_spte_clear_track_bits Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-29 18:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Jerome Glisse <jglisse@redhat.com> - 2017-08-29 20:30 +0200
Re: kvm splat in mmu_spte_clear_track_bits Jerome Glisse <jglisse@redhat.com> - 2017-08-29 20:40 +0200
Re: kvm splat in mmu_spte_clear_track_bits Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-29 21:10 +0200
Re: kvm splat in mmu_spte_clear_track_bits Jerome Glisse <jglisse@redhat.com> - 2017-08-29 21:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-29 21:40 +0200
Re: kvm splat in mmu_spte_clear_track_bits Andrea Arcangeli <aarcange@redhat.com> - 2017-08-29 22:50 +0200
Re: kvm splat in mmu_spte_clear_track_bits Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-29 23:00 +0200
Re: kvm splat in mmu_spte_clear_track_bits Michal Hocko <mhocko@kernel.org> - 2017-08-30 10:20 +0200
Re: kvm splat in mmu_spte_clear_track_bits Nadav Amit <nadav.amit@gmail.com> - 2017-08-29 18:00 +0200
Re: kvm splat in mmu_spte_clear_track_bits Mike Galbraith <efault@gmx.de> - 2017-08-29 15:00 +0200
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