From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758078AbYCaOl7 (ORCPT ); Mon, 31 Mar 2008 10:41:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752657AbYCaOhj (ORCPT ); Mon, 31 Mar 2008 10:37:39 -0400 Received: from bzq-179-150-194.static.bezeqint.net ([212.179.150.194]:51309 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751094AbYCaOhd (ORCPT ); Mon, 31 Mar 2008 10:37:33 -0400 From: Avi Kivity To: kvm-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org, Andrea Arcangeli Subject: [PATCH 15/40] KVM: Disable pagefaults during copy_from_user_inatomic() Date: Mon, 31 Mar 2008 17:36:59 +0300 Message-Id: <1206974244-9716-16-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.4.5 In-Reply-To: <1206974244-9716-1-git-send-email-avi@qumranet.com> References: <1206974244-9716-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrea Arcangeli With CONFIG_PREEMPT=n, this is needed in order to disable the fault-in code from sleeping. Signed-off-by: Andrea Arcangeli Signed-off-by: Avi Kivity --- virt/kvm/kvm_main.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 7972e3a..cf6df51 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -554,7 +554,9 @@ int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, addr = gfn_to_hva(kvm, gfn); if (kvm_is_error_hva(addr)) return -EFAULT; + pagefault_disable(); r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); + pagefault_enable(); if (r) return -EFAULT; return 0; -- 1.5.4.5