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* [PATCH 0/4] Fix RCU warnings in TDP MMU
@ 2021-03-11 23:16 Ben Gardon
  2021-03-11 23:16 ` [PATCH 1/4] KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page Ben Gardon
                   ` (4 more replies)
  0 siblings, 5 replies; 14+ messages in thread
From: Ben Gardon @ 2021-03-11 23:16 UTC (permalink / raw)
  To: linux-kernel, kvm
  Cc: Paolo Bonzini, Sean Christopherson, Peter Shier, Jim Mattson, Ben Gardon

The Linux Test Robot found a few RCU warnings in the TDP MMU:
https://www.spinics.net/lists/kernel/msg3845500.html
https://www.spinics.net/lists/kernel/msg3845521.html

Fix these warnings and cleanup a hack in tdp_mmu_iter_cond_resched.

Tested by compiling as suggested in the test robot report and confirmed that
the warnings go away with this series applied. Also ran kvm-unit-tests on an
Intel Skylake machine with the TDP MMU enabled and confirmed that the series
introduced no new failures.

Ben Gardon (4):
  KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page
  KVM: x86/mmu: Fix RCU usage for tdp_iter_root_pt
  KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs
  KVM: x86/mmu: Factor out tdp_iter_return_to_root

 arch/x86/kvm/mmu/tdp_iter.c | 34 +++++++++++++++++++++++++---------
 arch/x86/kvm/mmu/tdp_iter.h |  3 ++-
 arch/x86/kvm/mmu/tdp_mmu.c  | 19 +++++++++++--------
 3 files changed, 38 insertions(+), 18 deletions(-)

-- 
2.31.0.rc2.261.g7f71774620-goog


^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2021-03-15 17:14 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-11 23:16 [PATCH 0/4] Fix RCU warnings in TDP MMU Ben Gardon
2021-03-11 23:16 ` [PATCH 1/4] KVM: x86/mmu: Fix RCU usage in handle_removed_tdp_mmu_page Ben Gardon
2021-03-12 15:37   ` Sean Christopherson
2021-03-12 15:43     ` Paolo Bonzini
2021-03-15 17:08       ` Ben Gardon
2021-03-11 23:16 ` [PATCH 2/4] KVM: x86/mmu: Fix RCU usage for tdp_iter_root_pt Ben Gardon
2021-03-12 16:22   ` Sean Christopherson
2021-03-15 17:13     ` Ben Gardon
2021-03-11 23:16 ` [PATCH 3/4] KVM: x86/mmu: Fix RCU usage when atomically zapping SPTEs Ben Gardon
2021-03-12 16:24   ` Sean Christopherson
2021-03-11 23:16 ` [PATCH 4/4] KVM: x86/mmu: Factor out tdp_iter_return_to_root Ben Gardon
2021-03-12 16:35   ` Sean Christopherson
2021-03-12 17:00     ` Paolo Bonzini
2021-03-12 17:01 ` [PATCH 0/4] Fix RCU warnings in TDP MMU Paolo Bonzini

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