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[v3,-tip,0/5] kvm: Use rcuwait for vcpu blocking

Message ID 20200422040739.18601-1-dave@stgolabs.net (mailing list archive)
Headers show
Series kvm: Use rcuwait for vcpu blocking | expand

Message

Davidlohr Bueso April 22, 2020, 4:07 a.m. UTC 
The following is an updated revision of the kvm vcpu to rcuwait conversion[0],
following the work on completions using simple waitqueues.

Changes from v2:
  - new patch 3 which adds prepare_to_rcuwait and finish_rcu helpers.
  - fixed broken sleep and tracepoint semantics in patch 4. (Marc and Paolo)
  
This has only been run tested on x86 but compile tested on mips, powerpc
and arm32. 

This series applies on top of current -tip.

[0] https://lore.kernel.org/lkml/20200320085527.23861-3-dave@stgolabs.net/

Thanks!

Davidlohr Bueso (5):
  rcuwait: Fix stale wake call name in comment
  rcuwait: Let rcuwait_wake_up() return whether or not a task was awoken
  rcuwait: Introduce prepare_to and finish_rcuwait
  kvm: Replace vcpu->swait with rcuwait
  sched/swait: Reword some of the main description

 arch/mips/kvm/mips.c                  |  6 ++----
 arch/powerpc/include/asm/kvm_book3s.h |  2 +-
 arch/powerpc/include/asm/kvm_host.h   |  2 +-
 arch/powerpc/kvm/book3s_hv.c          | 22 ++++++++--------------
 arch/powerpc/kvm/powerpc.c            |  2 +-
 arch/x86/kvm/lapic.c                  |  2 +-
 include/linux/kvm_host.h              | 10 +++++-----
 include/linux/rcuwait.h               | 23 +++++++++++++++++------
 include/linux/swait.h                 | 23 +++++------------------
 kernel/exit.c                         |  9 ++++++---
 virt/kvm/arm/arch_timer.c             |  2 +-
 virt/kvm/arm/arm.c                    |  9 +++++----
 virt/kvm/async_pf.c                   |  3 +--
 virt/kvm/kvm_main.c                   | 19 +++++++++----------
 14 files changed, 63 insertions(+), 71 deletions(-)

Comments

Peter Zijlstra April 22, 2020, 11:33 a.m. UTC | #1 
On Tue, Apr 21, 2020 at 09:07:34PM -0700, Davidlohr Bueso wrote:
> Davidlohr Bueso (5):
>   rcuwait: Fix stale wake call name in comment
>   rcuwait: Let rcuwait_wake_up() return whether or not a task was awoken
>   rcuwait: Introduce prepare_to and finish_rcuwait
>   kvm: Replace vcpu->swait with rcuwait
>   sched/swait: Reword some of the main description

Thanks Dave!