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

From: Davidlohr Bueso
Date: Wed Apr 22 2020 - 00:11:47 EST


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@xxxxxxxxxxxx/

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(-)

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2.16.4