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38dbd48b24
qemu/hw
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Ján Tomko 38dbd48b24 virtio-balloon: return empty data when no stats are available 
If the guest hasn't updated the stats yet, instead of returning
an error, return '-1' for the stats and '0' as 'last-update'.

This lets applications ignore this without parsing the error message.

Related libvirt patch and discussion:
https://www.redhat.com/archives/libvir-list/2014-May/msg00460.html

Tested against current upstream libvirt - stat reporting works and
it no longer logs errors when the stats are queried on domain startup.
(Note: libvirt doesn't use the last-update field for anything yet)

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2014-05-25 12:46:58 +03:00
..
9pfs hw/9pfs: Add include file for exported symbol 2014-05-07 21:00:43 +04:00
acpi acpi/pcihp.c: Rewrite acpi_pcihp_get_bsel using object_property_get_int 2014-05-07 12:13:42 +03:00
alpha exec: Make stq_*_phys input an AddressSpace 2014-02-11 22:57:12 +10:00
arm hw/arm/stellaris: Correct handling of GPTM TAR register 2014-05-13 16:09:39 +01:00
audio migration/next for 20140515 2014-05-15 17:29:03 +01:00
block migration/next for 20140515 2014-05-15 17:29:03 +01:00
bt Preparation for usb-bt-dongle conditional build 2013-09-10 11:14:41 +02:00
char serial-pci: Set prog interface field of pci config to 16550 compatible 2014-05-21 15:47:50 +03:00
core savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
cpu icc_bus: QOM'ify ICC 2013-12-24 18:02:18 +01:00
cris cris: Remove the CRIS PIC glue 2014-02-03 14:04:00 +00:00
display migration/next for 20140515 2014-05-15 17:29:03 +01:00
dma migration/next for 20140515 2014-05-15 17:29:03 +01:00
gpio savevm: Remove all the unneeded version_minimum_id_old (arm) 2014-05-13 16:09:35 +01:00
i2c savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
i386 SMBIOS: Fix type 17 field sizes 2014-05-21 15:47:50 +03:00
ide savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
input input: switch ps/2 mouse to new input api 2014-05-16 08:30:12 +02:00
intc migration/next for 20140515 2014-05-15 17:29:03 +01:00
ipack savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
isa PortioList: Store PortioList in device state 2014-05-05 20:58:33 +02:00
lm32 hw/lm32: print error if cpu model is not found 2014-02-04 19:47:39 +01:00
m68k an5206: Don't enforce use of kernel for qtest 2013-11-05 17:47:29 +01:00
microblaze microblaze: boot: Don't hack the elf entry point 2014-05-13 09:12:40 +10:00
mips hw/mips: Add missing 'static' and 'const' attributes 2014-05-07 21:00:43 +04:00
misc migration/next for 20140515 2014-05-15 17:29:03 +01:00
moxie moxie: fix load_elf() usage 2014-03-05 03:06:46 +01:00
net migration/next for 20140515 2014-05-15 17:29:03 +01:00
nvram savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
openrisc openrisc-timer: Reduce overhead, Separate clock update functions 2013-11-20 21:46:45 +08:00
pci pcie_host: Turn pcie_host_init() into an instance_init 2014-05-21 15:47:50 +03:00
pci-bridge pci/shpc: convert SHPC hotplug to use hotplug-handler API 2014-02-10 10:27:00 +02:00
pci-host pcie_host: Turn pcie_host_init() into an instance_init 2014-05-21 15:47:50 +03:00
pcmcia qom: Add check() argument to object_property_add_link() 2014-03-19 22:23:13 +01:00
ppc hw: Add missing 'static' attributes 2014-05-07 21:00:43 +04:00
s390x savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
scsi Merge remote-tracking branch 'remotes/bonzini/scsi-next' into staging 2014-05-19 12:30:06 +01:00
sd savevm: Remove all the unneeded version_minimum_id_old (rest) 2014-05-14 15:24:51 +02:00
sh4 cputlb: Change tlb_flush() argument to CPUState 2014-03-13 19:52:47 +01:00
sparc sun4m: Add Sun CG3 framebuffer initialisation function 2014-02-27 10:01:41 +00:00
sparc64 pc,pci,virtio fixes and cleanups 2013-09-03 12:31:07 -05:00
ssi savevm: Remove all the unneeded version_minimum_id_old (arm) 2014-05-13 16:09:35 +01:00
timer qapi: Replace uncommon use of the error API by the common one 2014-05-15 14:00:46 -04:00
tpm aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
unicore32 console: add head to index to qemu consoles. 2014-03-05 09:52:04 +01:00
usb usb: fix up post load checks 2014-05-14 15:24:52 +02:00
virtio virtio-balloon: return empty data when no stats are available 2014-05-25 12:46:58 +03:00
watchdog PortioList: Store PortioList in device state 2014-05-05 20:58:33 +02:00
xen trivial patches for 2014-05-07 2014-05-07 18:38:39 +01:00
xenpv xen: move Xen PV machine files to hw/xenpv 2014-05-07 16:14:50 +00:00
xtensa hw/xtensa: add support for ML605 and KC705 FPGA board 2014-02-24 04:47:01 +04:00
Makefile.objs hw/9pfs: Include virtio-9p-device.o in build 2014-03-04 09:20:49 +05:30