Re: [Qemu-devel] [PATCH uq/master] kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation

[Andrey Korolyov]

On Wed, Jul 16, 2014 at 12:43 AM, Paolo Bonzini <address@hidden> wrote:
> Il 15/07/2014 22:34, Marcelo Tosatti ha scritto:
>
>> The backtrace in the following message is for a different problem,
>> correct?
>>
>> http://www.mail-archive.com/address@hidden/msg246161.html
>>
>>
>>
>
> Correct.
>
> Paolo

Sorry for being unclear. VM is running well, the resulting lockup
visibly affects only disk, I wrote this as a lockup, but it is not
complete lockup, I am able to execute cached executables (and see, for
example, soft lockup warnings for the disk). Unfortunately I had not
prepared -dbg package, so if you need exact trace, let me know, I
thought that it is necessary just for quick verification. I`ll be very
glad to provide any other information if necessary. As I mentioned in
original thread, the issue is not specific to the iothread code,
though I had not tested with other bus than virtio. If any of you who
are interested in solving such a decision (thing which broke stuff for
me fixes stuff in the other place) in place, I may offer you a
sandboxed environment with rbd-ready deployment. The argument set
follows:

qemu-system-x86_64 -enable-kvm -name vm27842 -S -machine
pc-i440fx-2.1,accel=kvm,usb=off -m 256 -realtime mlock=off -smp
12,sockets=1,cores=12,threads=12 -numa node,nodeid=0,cpus=0,mem=256
-uuid 9a44bdae-5702-463b-aa1e-d8d85055f6af -nographic -no-user-config
-nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm27842.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,clock=vm,driftfix=slew -global
kvm-pit.lost_tick_policy=discard -no-shutdown -boot strict=on -device
piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device
virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive
file=rbd:dev-rack2/vm27842-Kxs:id=qemukvm:key=XXXXXXXX:auth_supported=cephx\;none:mon_host=10.6.0.1\:6789\;10.6.0.4\:6789,if=none,id=drive-virtio-disk0,format=raw,cache=writeback
-device 
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-netdev tap,fd=23,id=hostnet0,vhost=on,vhostfd=24 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:10:03:40,bus=pci.0,addr=0x3
-netdev tap,fd=25,id=hostnet1,vhost=on,vhostfd=26 -device
virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:10:03:41,bus=pci.0,addr=0x4
-chardev pty,id=charserial0 -device
isa-serial,chardev=charserial0,id=serial0 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/vm27842.sock,server,nowait
-device 
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.1