From mboxrd@z Thu Jan 1 00:00:00 1970 From: ehrhardt@linux.vnet.ibm.com Subject: [PATCH 0/5] kvm-s390: revised version of kvm-s390 guest memory handling - v4 Date: Thu, 28 May 2009 17:43:03 +0200 Message-ID: <1243525388-3625-1-git-send-email-ehrhardt@linux.vnet.ibm.com> Cc: ehrhardt@linux.vnet.ibm.com, borntraeger@de.ibm.com, cotte@de.ibm.com, heiko.carstens@de.ibm.com, schwidefsky@de.ibm.com, mtosatti@redhat.com To: kvm@vger.kernel.org, avi@redhat.com Return-path: Received: from mtagate7.de.ibm.com ([195.212.29.156]:64147 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759930AbZE1PoC (ORCPT ); Thu, 28 May 2009 11:44:02 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate7.de.ibm.com (8.14.3/8.13.8) with ESMTP id n4SFh91v292604 for ; Thu, 28 May 2009 15:43:09 GMT Received: from d12av01.megacenter.de.ibm.com (d12av01.megacenter.de.ibm.com [9.149.165.212]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n4SFh9OD3096702 for ; Thu, 28 May 2009 17:43:09 +0200 Received: from d12av01.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av01.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n4SFh9I0022838 for ; Thu, 28 May 2009 17:43:09 +0200 Sender: kvm-owner@vger.kernel.org List-ID: From: Christian Ehrhardt *updates in v3* - ensure kick allocations (might_sleep) are out of atomic context - 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 - update vcpu->cpu in kvm-s390 arch handler for load/put - remove a redundant declaration in kvm_host.h related to load/put 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 - v4 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 - 7 files changed, 159 insertions(+), 78 deletions(-)