Please pull two changes that coincidentally happen to be related to vcpu->pid. The following changes since commit 5cb1659f412041e4780f2e8ee49b2e03728a2ba6: Merge branch 'kvm-no-struct-page' into HEAD (2024-10-25 13:38:16 -0400) are available in the Git repository at: https://github.com/kvm-x86/linux.git tags/kvm-x86-generic-6.13 for you to fetch changes up to 3e7f43188ee227bcf0f07f60a00f1fd1aca10e6a: KVM: Protect vCPU's "last run PID" with rwlock, not RCU (2024-10-30 14:41:22 -0700) ---------------------------------------------------------------- KVM generic changes for 6.13 - Rework kvm_vcpu_on_spin() to use a single for-loop instead of making two partial poasses over "all" vCPUs. Opportunistically expand the comment to better explain the motivation and logic. - Protect vcpu->pid accesses outside of vcpu->mutex with a rwlock instead of RCU, so that running a vCPU on a different task doesn't encounter long stalls due to having to wait for all CPUs become quiescent. ---------------------------------------------------------------- Sean Christopherson (3): KVM: Rework core loop of kvm_vcpu_on_spin() to use a single for-loop KVM: Return '0' directly when there's no task to yield to KVM: Protect vCPU's "last run PID" with rwlock, not RCU arch/arm64/include/asm/kvm_host.h | 2 +- include/linux/kvm_host.h | 3 +- virt/kvm/kvm_main.c | 143 ++++++++++++++++++++++---------------- 3 files changed, 86 insertions(+), 62 deletions(-)
