From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755498Ab0GFQZg (ORCPT ); Tue, 6 Jul 2010 12:25:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:11138 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753550Ab0GFQZe (ORCPT ); Tue, 6 Jul 2010 12:25:34 -0400 From: Gleb Natapov To: kvm@vger.kernel.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, avi@redhat.com, mingo@elte.hu, a.p.zijlstra@chello.nl, tglx@linutronix.de, hpa@zytor.com, riel@redhat.com, cl@linux-foundation.org, mtosatti@redhat.com Subject: [PATCH v4 07/12] Maintain memslot version number Date: Tue, 6 Jul 2010 19:24:55 +0300 Message-Id: <1278433500-29884-8-git-send-email-gleb@redhat.com> In-Reply-To: <1278433500-29884-1-git-send-email-gleb@redhat.com> References: <1278433500-29884-1-git-send-email-gleb@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Code that depends on particular memslot layout can track changes and adjust to new layout. Signed-off-by: Gleb Natapov --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 1 + 2 files changed, 2 insertions(+), 0 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e796326..64f62f1 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -177,6 +177,7 @@ struct kvm { raw_spinlock_t requests_lock; struct mutex slots_lock; struct mm_struct *mm; /* userspace tied to this vm */ + u32 memslot_version; struct kvm_memslots *memslots; struct srcu_struct srcu; #ifdef CONFIG_KVM_APIC_ARCHITECTURE diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index a60b6b0..733558c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -730,6 +730,7 @@ skip_lpage: slots->memslots[mem->slot] = new; old_memslots = kvm->memslots; rcu_assign_pointer(kvm->memslots, slots); + kvm->memslot_version++; synchronize_srcu_expedited(&kvm->srcu); kvm_arch_commit_memory_region(kvm, mem, old, user_alloc); -- 1.7.1