Re: [RFC][PATCH 0/4] Fixes for leapsecond expiring early ABS_TIME CLOCK_REALTIME timers

[Prarit Bhargava]

On 06/01/2015 01:02 PM, John Stultz wrote:
> On Mon, Jun 1, 2015 at 4:57 AM, Prarit Bhargava <prarit@xxxxxxxxxx> wrote:

>>
>> John, native testing went well across many 32-bit and 64-bit AMD and Intel
>> boxes.  However, virtual (specifically KVM) guests failed with some sort of
>> corruption:
>>
>> [ 1546.038479] Clock: inserting leap second 23:59:60 UTC
>> [ 1559.774700] Clock: inserting leap second 23:59:60 UTC
>> [ 1573.502989] Clock: inserting leap second 23:59:60 UTC
>> [ 1587.235917] Clock: inserting leap second 23:59:60 UTC
>> [    7.     X] Clock: inserting leap second 23:59:60 UTC
>> [    7.     X] Clock: inserting leap second 23:59:60 UTC
>> [    7.     X] Clock: inserting leap second 23:59:60 UTC
>> [    7.     X] Clock: inserting leap second 23:59:60 UTC
>>
>> I'm going to see if I can figure out a way to kdump a guest with this problem.
>> The issue is that it seems like all input to the console is ignored when this
>> happens.
> 
> Hrm. Can you send me the qemu version and command line you're using?

The qemu version is 1.5.3.

The command line is:

 /usr/libexec/qemu-kvm -name prarit_fedora_21 -S -machine
pc-i440fx-rhel7.0.0,accel=kvm,usb=off -m 4096 -realtime mlock=off -smp
4,sockets=4,cores=1,threads=1 -uuid a387ab20-1b19-4519-95dd-15805d40dfa0
-no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/prarit_fedora_21.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -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=/var/lib/libvirt/images/prarit_fedora_21.img,if=none,id=drive-virtio-disk0,format=raw,cache=none
-device
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-drive if=none,id=drive-ide0-1-0,readonly=on,format=raw -device
ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev
tap,fd=23,id=hostnet0,vhost=on,vhostfd=25 -device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:4f:4f:db,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0
-chardev spicevmc,id=charchannel0,name=vdagent -device
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
-device usb-tablet,id=input0 -spice
port=5902,addr=127.0.0.1,disable-ticketing,seamless-migration=on -vga qxl
-global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=67108864 -global
qxl-vga.vgamem_mb=16 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device
hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on

P.

> 
> thanks
> -john
> 
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