From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [RFC 1/8]KVM: fix bugs in kvm sched integration patch Date: Mon, 23 Jul 2007 13:46:43 +0300 Message-ID: <46A48713.9080404@qumranet.com> References: <1185173492.2645.65.camel@sli10-conroe.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel , lkml To: Shaohua Li Return-path: In-Reply-To: <1185173492.2645.65.camel-yAZKuqJtXNMXR+D7ky4Foa2pdiUAq4bhAL8bYrjMMd8@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 Shaohua Li wrote: > fix some bugs in kvm-sch patch. > There is now a 'preempt-hooks' branch on kvm.git with the preempt-hooks work. I'll continually update and rebase it against master. > 1. vmcs_readl/vmcs_writel are called with preempt enabled > Why is that bad? > 2. preempt_count check doesn't make sense with preempt disabled > That is already fixed in the branch. > 3. vmx_cpu_run doesn't handle error correctly and kvm_mmu_reload might > sleep with mutex changes, so I move it above. > Yes. > @@ -2001,6 +1997,10 @@ preempted: > kvm_guest_debug_pre(vcpu); > > again: > + r = kvm_mmu_reload(vcpu); > + if (unlikely(r)) > + goto out; > + > preempt_disable(); > > if (!vcpu->mmio_read_completed) > @@ -2009,10 +2009,6 @@ again: > vmx_save_host_state(vcpu); > kvm_load_guest_fpu(vcpu); > > - r = kvm_mmu_reload(vcpu); > - if (unlikely(r)) > - goto out; > - > /* > * Loading guest fpu may have cleared host cr0.ts > */ > I'll add this (and the spinlock->mutex conversion) to the branch. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/