From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: 2.6.30-rc1 A few issues and a stall Date: Tue, 14 Apr 2009 15:39:42 +0300 Message-ID: <49E4840E.6010300@redhat.com> References: <200904121124.07193.edt@aei.ca> <49E45F8E.9080803@redhat.com> <200904140832.25057.edt@aei.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: LKML , netdev@vger.kernel.org, linux-acpi@vger.kernel.org To: Ed Tomlinson Return-path: In-Reply-To: <200904140832.25057.edt@aei.ca> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Ed Tomlinson wrote: > On Tuesday 14 April 2009 06:03:58 Avi Kivity wrote: > >> Ed Tomlinson wrote: >> >>> Once the above networking stuff is setup I start kvm with the command below >>> >>> QEMU_AUDIO_DRV=alsa kvm -m 1024 -cdrom /mnt/sdc4/divx/archlinux-2009.02-ftp-i686.iso -boot c -smp 3 -usb -usbdevice tablet -vga std -drive file=arch.img -net nic,macaddr=52:54:00:12:34:23 -net tap,ifname=qtap0,script=no -soundhw all -mem-path /hugepages >>> >>> which works and the kvm session boots just fine. >>> >>> Issue 2. When I attempt to ping outside the kvm session the pc (not just the kvm session) hangs. >>> Its impossible to kill the kvm session and there are numerious info messages from RCU (tree RCU enabled) >>> about stalls. >>> >>> >> The rcu messages are likely because a processor has died. >> >> Do things work if you drop -mem-path? >> > > It makes no difference. I did notice that one cpu is peged at 100% though. I'll be trying > CONFIG_PROVE_LOCKING tonight for another problem - might give interesting results. > Oh, so this goes away without CONFIG_PROVE_LOCKING? -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.