From: Christian Ehrhardt <ehrhardt@xxxxxxxxxx> *updates in v5* - ensure dropping all vcpu requests while freeing a vcpu *updates in v4* - ensure kick allocations (might_sleep) are out of atomic context - update vcpu->cpu in kvm-s390 arch handler for load/put - remove a redundant declaration in kvm_host.h related to load/put *updates in v3* - replaced "kick to level" behaviour by "kick to low level and bail out" - updates on running vcpus can now be handled without need to rerun the vcpu - kvm_arch_set_memory_region waits until the update is consumed by the vcpu - kickout only scheduled vcpus (wait might hang forever on non-scheduled vcpus) - moved some code between patches 1 & 2 thematically Note: further unification of make_all_cpu_request and the kick mechanism is planned, but it might be good to split it from this step towards commonality. *updates in v2* added optimization to patch 3/3 to skip (addtional) kickout of vcpu's that had the request already set. This patch series results from our discussions about handling memslots and vcpu mmu reloads. It streamlines kvm-s390 a bit by using slots_lock, vcpu-request (KVM_REQ_MMU_RELOAD) and a kick mechanism to ensure vcpus come out of guest context to catch the update. I tested the reworked code a while with multiple smp guests and some extra code that periodically injects kicks and/or mmu reload requests, but I'm happy about every additional review feedback. Patches included: Subject: [PATCH 1/5] kvm-s390: infrastructure to kick vcpus out of guest state - v3 Subject: [PATCH 2/5] kvm-s390: fix interruption casued by signal - v2 Subject: [PATCH 3/5] kvm-s390: update vcpu->cpu Subject: [PATCH 4/5] kvm: remove redundant declarations Subject: [PATCH 5/5] kvm-s390: streamline memslot handling - v5 Overall-Diffstat: arch/s390/include/asm/kvm_host.h | 9 ++--- arch/s390/kvm/gaccess.h | 23 ++++++------ arch/s390/kvm/intercept.c | 20 +++++++---- arch/s390/kvm/kvm-s390.c | 70 ++++++++++++++++++++------------------- arch/s390/kvm/kvm-s390.h | 50 +++++++++++++++++++++++++++ arch/s390/kvm/sigp.c | 63 ++++++++++++++++++++++++----------- include/linux/kvm_host.h | 2 - virt/kvm/kvm_main.c | 1 8 files changed, 160 insertions(+), 78 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
