From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [KVM][PATCH] smp_processor_id() and sleeping functions used in invalid context Date: Sun, 31 Dec 2006 19:50:09 +0200 Message-ID: <4597F851.8060800@qumranet.com> References: <20061231170147.GA8695@dreamland.darkstar.lan> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Return-path: To: Luca Tettamanti In-Reply-To: <20061231170147.GA8695-sTXFmx6KbOnUXq0IF5SVAZ4oGUkBHcCu@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Luca Tettamanti wrote: > Hello, > I'm testing KVM on a Core2 CPU. I'm running kernel 2.6.20-git (pulled > few hours ago), configured with SMP and PREEMPT. > > I'm hitting 2 different warnings: > BUG: using smp_processor_id() in preemptible [00000001] code: kvm/7726 > caller is vmx_create_vcpu+0x9/0x2f [kvm_intel] > > [...] > vmx_create_vcpu calls alloc_vmcs which uses smp_processor_id() in > preemptible context and pass the result to alloc_vmcs_cpu(); at a later > point the function may be running on a different CPU (hence the result > of cpu_to_node may be meaningless). > > Second one: > BUG: sleeping function called from invalid context at > /home/kronos/src/linux-2.6.git/mm/slab.c:3034 > in_atomic():1, irqs_disabled():0 > 1 lock held by kvm/12706: > #0: (&vcpu->mutex){--..}, at: [] kvm_dev_ioctl+0x113/0xf97 > [kvm] > [] kmem_cache_alloc+0x1b/0x6f > [...] There are patches for both (I think) flying around. They should land in Linus' tree in a few days. Thanks, -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV