From: Christian Ehrhardt <ehrhardt@xxxxxxxxxx> *updates in v6* - drop the unrelated fix to kvm_host.h from the series to clear it thematically - ensure the wait_on_bit waiter is notified - move the reset of requests to kvm_vcpu_release to drop them early Note: I beg a pardon for the change rate of these series in the last three days. I wanted it off my todo pile and repeatedly found issues over night. I think it is now in a state that might not be perfect, but its an self-contained step and an improvement to what we had before. I ensure you this time I wait for feedback or acceptance *g*. *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 1/4] kvm-s390: infrastructure to kick vcpus out of guest state - v3 Subject: [PATCH 2/4] kvm-s390: fix interruption caused by signal - v2 Subject: [PATCH 3/4] kvm-s390: update vcpu->cpu Subject: [PATCH 4/4] kvm-s390: streamline memslot handling - v6 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 | 53 ++++++++++++++++++++++++++++- arch/s390/kvm/sigp.c | 63 ++++++++++++++++++++++++----------- virt/kvm/kvm_main.c | 4 ++ 7 files changed, 166 insertions(+), 76 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
